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Journal articles on the topic 'Stereochemical mechanism'

Author: Grafiati

Published: 5 June 2025

Last updated: 2 August 2025

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1

Ojima, Iwao, and Zhaoda Zhang. "Mechanism of amidocarbonylation: a stereochemical approach." Organometallics 9, no. 12 (1990): 3122–27. http://dx.doi.org/10.1021/om00162a025.

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2

OJIMA, I., and Z. ZHANG. "ChemInform Abstract: Mechanism of Amidocarbonylation: A Stereochemical Approach." ChemInform 22, no. 13 (2010): no. http://dx.doi.org/10.1002/chin.199113126.

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3

Horwitz, Matthew A., Naoya Tanaka, Takuya Yokosaka, Daisuke Uraguchi, Jeffrey S. Johnson, and Takashi Ooi. "Enantioselective reductive multicomponent coupling reactions between isatins and aldehydes." Chemical Science 6, no. 11 (2015): 6086–90. http://dx.doi.org/10.1039/c5sc02170g.

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A reductive coupling of two different carbonyls via a polar two-electron reaction mechanism was developed and the stereochemical outcome of this multicomponent process is precisely controlled by a chiral triaminoiminophosphorane.

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4

Diebler, J., A. Spannenberg, and T. Werner. "Atom economical synthesis of di- and trithiocarbonates by the lithium tert-butoxide catalyzed addition of carbon disulfide to epoxides and thiiranes." Organic & Biomolecular Chemistry 14, no. 31 (2016): 7480–89. http://dx.doi.org/10.1039/c6ob01081d.

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The lithium tert-butoxide catalyzed addition of CS<sub>2</sub> to epoxides and thiiranes under mild conditions is reported. A mechanism has been proposed taking into account the regio- and stereochemical outcome of the reaction.

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5

Dimukhametov, Mudaris N., Evgenia V. Bayandina, Elena Yu Davydova, Aidar T. Gubaidullin, Igor A. Litvinov, and Vladimir A. Alfonsov. "A stereochemical approach to the Kabachnik–Fields reaction mechanism." Mendeleev Communications 13, no. 3 (2003): 150–51. http://dx.doi.org/10.1070/mc2003v013n03abeh001763.

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6

Citron, Christian A., Nelson L. Brock, Patrick Rabe, and Jeroen S. Dickschat. "The Stereochemical Course and Mechanism of the IspH Reaction." Angewandte Chemie International Edition 51, no. 17 (2012): 4053–57. http://dx.doi.org/10.1002/anie.201201110.

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7

Jackson, WR, MR Moffat, P. Perlmutter, and EE Tasdelen. "The Stereochemistry of Organometallic Compounds. XXXVIII. Regio- and Stereo-control in the Rhodium-Catalyzed Hydroformylation of Some Alkenyl Phosphites." Australian Journal of Chemistry 45, no. 5 (1992): 823. http://dx.doi.org/10.1071/ch9920823.

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Excellent regiocontrol is achieved in the rhodium-catalysed hydroformylation of some alkenyl phosphites, and good stereocontrol is obtained in the hydroformylation of some cyclohexenyl phosphites. The stereochemical results have implications for the mechanism of these rhodium-catalysed reactions.

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8

Nakamura, Kaoru, Yasushi Kawai, Takehiko Miyai, Sohichi Honda, Nobuyoshi Nakajima, and Atsuyoshi Ohno. "Stereochemical Control in Microbial Reduction. 18. Mechanism of Stereochemical Control in the Diastereoselective Reduction with Baker’s Yeast." Bulletin of the Chemical Society of Japan 64, no. 5 (1991): 1467–70. http://dx.doi.org/10.1246/bcsj.64.1467.

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9

Perutz, M. F., A. J. Wilkinson, M. Paoli, and G. G. Dodson. "THE STEREOCHEMICAL MECHANISM OF THE COOPERATIVE EFFECTS IN HEMOGLOBIN REVISITED." Annual Review of Biophysics and Biomolecular Structure 27, no. 1 (1998): 1–34. http://dx.doi.org/10.1146/annurev.biophys.27.1.1.

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10

Cao, Shuxia, and Yufen Zhao. "Progress in the Atherton-Todd reaction and its stereochemical mechanism." SCIENTIA SINICA Chimica 45, no. 3 (2015): 283–94. http://dx.doi.org/10.1360/n032014-00294.

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11

SPACEK, M., J. PALECEK, and I. VESELY. "ChemInform Abstract: Mechanism and Stereochemical Problems of the Wittig Reaction." ChemInform 24, no. 24 (2010): no. http://dx.doi.org/10.1002/chin.199324333.

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12

Hegarty, AF, P. Rigopoulos, and JE Rowe. "Mechanisms of Nucleophilic Attack at Carbon Nitrogen Double-Bonds: The Reaction of Benzohydrazonoyl Halides With Amines." Australian Journal of Chemistry 40, no. 10 (1987): 1777. http://dx.doi.org/10.1071/ch9871777.

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Rate data for the reaction of a series of benzohydrazonoyl halides with pyrrolidine and butan- 1-amine at 303 K are presented. Linear Hammett plots were obtained with each amine. The mechanism of the reactions and the stereochemical outcome of these displacements at the carbon-nitrogen double bond are discussed.

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13

Kawai, Yasushi, Kousuke Takanobe, and Atsuyoshi Ohno. "Stereochemical Control in Microbial Reduction. XXIX. Mechanism of Stereochemical Control with an Additive in the Diastereoselective Reduction byGeotrichum candidum." Bulletin of the Chemical Society of Japan 70, no. 7 (1997): 1683–86. http://dx.doi.org/10.1246/bcsj.70.1683.

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14

Xiong, Fei, Bei-Bei Yang, Jie Zhang, and Li Li. "Enantioseparation, Stereochemical Assignment and Chiral Recognition Mechanism of Sulfoxide-Containing Drugs." Molecules 23, no. 10 (2018): 2680. http://dx.doi.org/10.3390/molecules23102680.

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The distinct pharmacodynamic and pharmacokinetic properties of enantiopure sulfoxide drugs have stimulated us to systematically investigate their chiral separation, stereochemical assignment, and chiral recognition mechanism. Herein, four clinically widely-used sulfoxide drugs were chosen and optically resolved on various chiral stationary phases (CSPs). Theoretical simulations including electronic circular dichroism (ECD) calculation and molecular docking were adopted to assign the stereochemistry and reveal the underlying chiral recognition mechanism. Our results showed that the sequence of

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15

Crich, David, та Qingwei Yao. "The β-(phosphatoxy)alkyl radical rearrangement. A stereochemical probe of mechanism". Tetrahedron Letters 34, № 36 (1993): 5677–80. http://dx.doi.org/10.1016/s0040-4039(00)73831-7.

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16

Genet, Jean Pierre, Angela Marinetti, and Virginie Ratovelomanana-Vidal. "Recent advances in asymmetric catalysis. Synthetic applications to biologically active compounds." Pure and Applied Chemistry 73, no. 2 (2001): 299–303. http://dx.doi.org/10.1351/pac200173020299.

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New chiral cationic ruthenium complexes have been used for the industrial synthesis of (+) -dihydrojasmonate. A new class of electron-rich C2-symmetric 2,4-disubstituted phosphetanes (CnrPHOS) was developed. Preliminary evaluation of their catalytic properties revealed high efficiency in rhodium and ruthenium-catalyzed asymmetric hydrogenations. A new stereochemical model is presented in which the phosphetane Rh-catalyzed hydrogenation follows an apparent stability-controlled mechanism.

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17

Speranza, Giovanna, Wolfgang Buckel, and Bernard T. Golding. "CoenzymeB12-dependent enzymatic dehydration of 1,2-diols: simple reaction, complex mechanism!" Journal of Porphyrins and Phthalocyanines 08, no. 03 (2004): 290–300. http://dx.doi.org/10.1142/s1088424604000271.

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The conversion of glycerol to acrolein is an undesirable event in whisky production, caused by infection of the broth with Klebsiella pneumoniae. This organism uses glycerol dehydratase to transform glycerol into 3-hydroxypropanal, which affords acrolein on distillation. The enzyme requires adenosylcobalamin (coenzyme B12) as cofactor and a monovalent cation (e.g. K+). Diol dehydratase is a similar enzyme that converts 1,2-diols ( C2- C4) including glycerol into an aldehyde and water. The subtle stereochemical features of these enzymes are exemplified by propane-1,2-diol: both enantiomers are

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18

Green, James R., Marek Majewski та Victor Snieckus. "Deprotonation of β,β-disubstituted α,β-unsaturated amides - Mechanism and stereochemical consequences". Canadian Journal of Chemistry 84, № 10 (2006): 1397–410. http://dx.doi.org/10.1139/v06-112.

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A detailed study of the lithium dialkylamide induced deprotonation of β,β-disubstituted α,β-unsaturated amides is presented. The preferential γ-Z-deprotonation and stereochemical outcome of substituents on the γ-Z carbon atom are rationalized in terms of a cyclic eight-membered transition state, which is supported by DFT calculations. Analogous deprotonations on cyclohexylidenecarboxamides reveal a delicate balance of the preference for the eight-membered cyclic transition state with the effects of existing substituents on the ring and the intervention of a twist-boat transition state.Key word

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19

Jasiński, Radomir. "On the Question of Stepwise [4+2] Cycloaddition Reactions and Their Stereochemical Aspects." Symmetry 13, no. 10 (2021): 1911. http://dx.doi.org/10.3390/sym13101911.

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Even at the end of the twentieth century, the view of the one-step [4+2] cycloaddition (Diels-Alder) reaction mechanism was widely accepted as the only possible one, regardless of the nature of the reaction components. Much has changed in the way these reactions are perceived since then. In particular, multi-step mechanisms with zwitterionic or diradical intermediates have been proposed for a number of processes. This review provided a critical analysis of such cases.

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20

Janzen, Alexander F., and Meehae Jang. "Isomerization, fluorine exchange, and stereoselective synthesis of cis- and trans-F2TePh3Cl: application of the coordination model of reaction mechanisms." Canadian Journal of Chemistry 67, no. 1 (1989): 71–75. http://dx.doi.org/10.1139/v89-012.

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The stereoselective synthesis of cis- and trans-F2TePh3Cl (phenyl substituents adopt a mer arrangement) via 5-coordinate cations Ph3TeFCl+ and [Formula: see text] is described. trans-F2TcPh3Cl isomerizes to the thermodynamically more stable cis isomer, and cis -F2TePh3Cl has non-equivalent fluorines which undergo stereoselective fluorine exchange, as confirmed by 19F and l25Te nmr spectroscopy. These results are consistent with an intermolecular mechanism of isomerization and fluorine exchange involving Te—F bond cleavage.The coordination model of reaction mechanisms provides a unified descrip

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21

Jarvo, Elizabeth R., Erika L. Lucas, Tristan M. McGinnis, and Anthony J. Castro. "Nickel-Catalyzed Cross-Electrophile Coupling of the Difluoromethyl Group for Fluorinated Cyclopropane Synthesis." Synlett 32, no. 15 (2021): 1525–30. http://dx.doi.org/10.1055/s-0040-1706013.

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AbstractHerein, we report a new strategy for fluorinated cyclopropane synthesis. Photocatalytic olefin difluoromethylation is coupled with a nickel-catalyzed intramolecular cross-electrophile coupling (XEC) reaction between a difluoromethyl moiety and a benzylic ether. To the best of our knowledge, this is the first example of a XEC reaction employing a difluoromethyl group as an electrophile. A plausible mechanism is highlighted, and DFT calculations are included to support the observed stereochemical outcome.

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22

Zhao, Hong-Wu, Zhe Tang, Hui-Hui Wu, et al. "Diastereoselective Synthesis of Spiropyrazolones via 1,3-Dipolar [3+2] Cycloadditions between Pyrazolone-Based Olefins and N,N′-Cyclic Azomethine Imines." Synlett 32, no. 12 (2021): 1201–6. http://dx.doi.org/10.1055/a-1506-4509.

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AbstractUnder the catalysis of PhCO2H, the 1,3-dipolar [3+2] cycloaddition between pyrazolone-based olefins and N,N′-cyclic azomethine imines proceeded readily, thus delivering structurally novel spiropyrazolones with up to 98% yield and >20:1 dr. The relative stereochemical configuration of the obtained spiropyrazolones was unambiguously assigned by X-ray single-crystal structure analysis. The diastereoselective formation of the title spiropyrazolones was interpreted by the hypothesized reaction mechanism.

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23

Komeyama, Kimihiro, Shunsuke Sakiyama, Kento Iwashita, Itaru Osaka, and Ken Takaki. "Three-component coupling of aryl iodides, allenes, and aldehydes catalyzed by a Co/Cr-hybrid catalyst." Beilstein Journal of Organic Chemistry 14 (June 11, 2018): 1413–20. http://dx.doi.org/10.3762/bjoc.14.118.

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The cobalt/chromium-catalyzed three-component coupling of aryl iodides, allenes, and aldehydes has been developed to afford multi-substituted homoallylic alcohols in a diastereoselective manner. Control experiments for understanding the reaction mechanism reveal that the cobalt catalyst is involved in the oxidative addition and carbometalation steps in the reaction, whereas the chromium salt generates highly nucleophilic allylchromium intermediates from allylcobalt species, without the loss of stereochemical information, to allow the addition to aldehydes.

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24

Pietrzykowski, Antoni, Stanisław Pasynkiewicz та Piotr Buchalski. "Stereochemical Factors of γ-H Eliminationin Cyclopentadienylvinylnickel Compounds". Collection of Czechoslovak Chemical Communications 62, № 2 (1997): 318–24. http://dx.doi.org/10.1135/cccc19970318.

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The reactions of nickelocene with cis-1,2-diphenylpropylmagnesium bromide and with trans-1,2-diphenylpropenyllithium had been studied. It was found that cis-1,2-diphenylpropenylcyclopentadienylnickel underwent γ-H elimination to form a mixture of (η5-cyclopentadienyl)[η3-1,2-(anti)-diphenylpropenyl]nickel and (η5-cyclopentadienyl)[η3-1,2-(syn)-diphenylpropenyl]nickel as the main products. The mechanism of this reaction has been discussed. Dihydrotetra(cyclopentadienylnickel) cluster (NiCp)4H2 was the main organometallic product of the reaction of nickelocene with trans-1,2-diphenylpropenyllith

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25

Unruh, Tobias, and Peter Vöhringer. "Thermal Isomerization of [Co(acac)2(N3)(py)] in Liquid Solution Studied by Time-Resolved Fourier-Transform Infrared Spectroscopy." Zeitschrift für Physikalische Chemie 234, no. 7-9 (2020): 1549–66. http://dx.doi.org/10.1515/zpch-2020-0006.

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AbstractThe thermally induced stereochemical interconversion between the trans and cis isomers of [Co(acac)2(N3)(py)] in liquid solution is investigated with time-resolved Fourier-transform infrared spectroscopy. The complex is synthesized stereo-selectively in its trans-form. Upon dissolution of the trans-form, the kinetic build-up of the cis-form is evidenced by the spectro-temporal evolution of the FTIR-spectrum. The individual isomer-specific component spectra are in good agreement with calculated spectra obtained from density functional theory. The rate constants of the forward and backwa

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26

Malet, C., J. Jiménez-Barbero, M. Bernabé, C. Brosa та A. Planas. "Stereochemical course and structure of the products of the enzymic action of endo-1,3-1,4-β-d-glucan 4-glucanohydrolase from Bacillus licheniformis". Biochemical Journal 296, № 3 (1993): 753–58. http://dx.doi.org/10.1042/bj2960753.

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The stereochemical course of the reaction catalysed by endo-1,3-1,4-beta-D-glucan 4-glucanohydrolase (EC 3.2.1.73) has been determined by 1H n.m.r. The enzyme-catalysed hydrolysis of barley beta-glucan proceeds with overall retention of the anomeric configuration, indicating that the enzyme operates through a double-displacement mechanism. The structures of the final oligosaccharide products, 3-beta-O-cellobiosyl D-glucopyranoside and 3-beta-O-cellotriosyl D-glucopyranoside, have been completely assigned by 1H- and 13C-n.m.r. spectroscopy.

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27

Kang, Jiheong, Daigo Miyajima, Tadashi Mori, Yoshihisa Inoue, Yoshimitsu Itoh, and Takuzo Aida. "A rational strategy for the realization of chain-growth supramolecular polymerization." Science 347, no. 6222 (2015): 646–51. http://dx.doi.org/10.1126/science.aaa4249.

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Over the past decade, major progress in supramolecular polymerization has had a substantial effect on the design of functional soft materials. However, despite recent advances, most studies are still based on a preconceived notion that supramolecular polymerization follows a step-growth mechanism, which precludes control over chain length, sequence, and stereochemical structure. Here we report the realization of chain-growth polymerization by designing metastable monomers with a shape-promoted intramolecular hydrogen-bonding network. The monomers are conformationally restricted from spontaneou

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28

HARA, Akira, Toshihiro NAKAYAMA, Makoto NAKAGAWA, Yoshio INOUE, Hiroyuki TANABE та Hideo SAWADA. "Kinetic and Stereochemical Studies on Reaction Mechanism of Mouse Liver 17β-Hydroxysteroid Dehydrogenases". Journal of Biochemistry 102, № 6 (1987): 1585–92. http://dx.doi.org/10.1093/oxfordjournals.jbchem.a122208.

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29

Maryanoff, Bruce E., and Allen B. Reitz. "DELVING INTO THE WITTIG REACTION-STEREOCHEMISTRY AND MECHANISM. STEREOCHEMICAL IDIOSYNCRASIES AND MECHANISTIC IMPLICATIONS1." Phosphorous and Sulfur and the Related Elements 27, no. 1-2 (1986): 167–89. http://dx.doi.org/10.1080/03086648608072769.

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30

Eis, Christian, Martin Albert, Karl Dax, and Bernd Nidetzky. "The stereochemical course of the reaction mechanism of trehalose phosphorylase from Schizophyllum commune." FEBS Letters 440, no. 3 (1998): 440–43. http://dx.doi.org/10.1016/s0014-5793(98)01504-x.

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31

Wu, Zhen-Long, Xiao-Jun Huang, Li-Jun Hu, et al. "Absolute Configurations and Stereochemical Inversion Mechanism of Epimeric Securinega Alkaloids from Flueggea suffruticosa." Organic Letters 22, no. 9 (2020): 3673–78. http://dx.doi.org/10.1021/acs.orglett.0c01167.

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32

Ganosan, A., and Clayton H. Heathcock. "A Stereochemical test of the mechanism of electrophilic substitution in 3-substituted indoles." Tetrahedron Letters 34, no. 3 (1993): 439–40. http://dx.doi.org/10.1016/0040-4039(93)85096-f.

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33

Bartolo, Nicole, Jacquelyne Read, Elizabeth Valentín, and K. Woerpel. "Reactions of Allylmagnesium Halides with Carbonyl Compounds: Reactivity, Structure, and Mechanism." Synthesis 49, no. 15 (2017): 3237–46. http://dx.doi.org/10.1055/s-0036-1588427.

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The additions of allylmagnesium reagents to carbonyl compounds are important methods in synthetic organic chemistry, but the mechanisms of these reactions are likely to be distinct from mechanisms followed by other organomagnesium reagents. Additions to alkyl aldehydes and ketones are likely to be concerted, proceeding through six-membered-ring transition states. These highly reactive reagents appear to react at rates that approach the diffusion limit, so chemoselectivity is generally low. Furthermore, reactions of allylmagnesium halides with carbonyl compounds are unlikely to follow stereoche

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34

Orelli, Liliana R., María C. Mollo, Juan A. Bisceglia, Natalia B. Kilimciler, and Michele Mancinelli. "Microwave-Assisted Synthesis of 2-Substituted 2-Thiazolines and 5,6-Dihydro-4H-1,3-thiazines." Synthesis 52, no. 11 (2020): 1666–79. http://dx.doi.org/10.1055/s-0039-1690822.

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An efficient and general method for the synthesis of 2-substituted thiazolines and 5,6-dihydro-4H-1,3-thiazines is developed via microwave-assisted ring closure of ω-thioamidoalcohols promoted by ethyl polyphosphate (PPE). The cyclization reaction involves an SN2-type mechanism and features the advantages of very short reaction times, high yields and a predictable stereochemical outcome. The acyclic precursors are prepared in high overall yields by an improved diacylation–thionation–saponification sequence from commercially available ω-aminoalcohols. The whole process is metal-free and operat

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35

STEPHEN, F. MASON. "Lanthanide(III) f-f Transition Probabilities." Journal of Indian Chemical Society Vol. 63, Jan 1986 (1986): 73–79. https://doi.org/10.5281/zenodo.6241388.

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Chemistry Department, King's College, University of London, Strand, London WC2R 2LS, England The dynamic coupling mechanism for f — f transition probabilities in lanthanide(III) complexes is extended to include the polarisability-anisotropy of the ligands, with applications to complexes with D<sub>3</sub> and D<sub>4</sub> coordination polyhedra. The ligand-polarisation and the crystal-field mechanisms for f — f transition probabilities are found to be complementary, applying primarily to the lower and the higher even 2λ-pole transitions, respectively.

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36

Rybáčková, Markéta, Jan Hošek, Ondřej Šimůnek, Viola Kolaříková, and Jaroslav Kvíčala. "Computational study of productive and non-productive cycles in fluoroalkene metathesis." Beilstein Journal of Organic Chemistry 11 (November 10, 2015): 2150–57. http://dx.doi.org/10.3762/bjoc.11.232.

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A detailed DFT study of the mechanism of metathesis of fluoroethene, 1-fluoroethene, 1,1-difluoroethene, cis- and trans-1,2-difluoroethene, tetrafluoroethene and chlorotrifluoroethene catalysed with the Hoveyda–Grubbs 2nd generation catalyst was performed. It revealed that a successful metathesis of hydrofluoroethenes is hampered by a high preference for a non-productive catalytic cycle proceeding through a ruthenacyclobutane intermediate bearing fluorines in positions 2 and 4. Moreover, the calculations showed that the cross-metathesis of perfluoro- or perhaloalkenes should be a feasible proc

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37

Mazal, Ctibor, та Jaroslav Jonas. "Nucleophilic Vinylic Substitution on α-Tosyloxymethylene Lactones". Collection of Czechoslovak Chemical Communications 58, № 7 (1993): 1607–23. http://dx.doi.org/10.1135/cccc19931607.

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Sodium salt of 3-hydroxymethylenetetrahydro-2H-pyran-2-one (V), obtained by Claisen condensation of δ-valerolactone with ethyl formate, was converted into its sulfonates and carboxylates IV, VII - X, which were obtained either as pure E-isomers or as mixtures of E- and Z-isomers; the mixtures were chromatographically separated. Substitution reaction of α-tosyloxymethylene lactones II, III and IV with aromatic thiols, azide anion, secondary amines and sodium enolates XI, XII and V was studied. The stereochemical outcome of this substitution is discussed from the viewpoint of mechanism of nucleo

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38

ISHIDUKA, TAKAAKI, MASAO TSUKAYAMA, and YASUHIKO KAWAMURA. "PREPARATION OF 1,1-DIARYLETHENES BY MCMURRY REACTION: MECHANISM AND GEOMETRY SELECTION." International Journal of Modern Physics B 20, no. 25n27 (2006): 4595–600. http://dx.doi.org/10.1142/s0217979206041744.

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The McMurry crossed coupling reactions of p,p′-disubstituted benzophenones (1) with pivalaldehyde (Pv) gave the corresponding ethenes (2) in fair to excellent yield. The observed geometrical selectivity is varied depending on a kind of p-substituent of the aromatic moiety of 1, when p′-substituent is limited to methyl. According to the known reaction mechanism, the reason why the geometry selection occurred is discussed by a conformational analysis of a possible intermediate, titanium bound pinacolate, and molecular orbital calculations of the starting carbonyl compounds. As a result, the sele

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39

He, Jieyu, Jiashu Liao, and Junyan Qu. "A Proposed Stereochemical Mechanism for the Improved Preparation of Maleic Anhydride Cycloadduct of CLA." Computational Chemistry 09, no. 03 (2021): 144–60. http://dx.doi.org/10.4236/cc.2021.93009.

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40

CUMMINS, JANE H., and BARRY V. L. POTTER. "Stereochemical mechanism of the cleavage reaction catalysed by bovine intestinal mucosa 5′-nucleotide phosphodiesterase." Biochemical Society Transactions 14, no. 6 (1986): 1289–90. http://dx.doi.org/10.1042/bst0141289.

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41

LOW, BARBARA W., and PETER W. R. CORFIELD. "Neurotoxin Binding Site on the Acetylcholine Receptor: Stereochemical Model and Proposed Mechanism of Binding." Annals of the New York Academy of Sciences 505, no. 1 Myasthenia Gr (1987): 750–51. http://dx.doi.org/10.1111/j.1749-6632.1987.tb51358.x.

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42

Moriarty, Robert M., Sachin Tyagi, Daniela Ivanov, and Mircea Constantinescu. "The Mechanism of 1,4 Alkyl Group Migration in Hypervalent Halonium Ylides: The Stereochemical Course." Journal of the American Chemical Society 130, no. 24 (2008): 7564–65. http://dx.doi.org/10.1021/ja802735f.

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43

Thiele, Bärbel, Oliver Rieder, Bernard T. Golding, Michael Müller, and Matthias Boll. "Mechanism of Enzymatic Birch Reduction: Stereochemical Course and Exchange Reactions of Benzoyl-CoA Reductase." Journal of the American Chemical Society 130, no. 43 (2008): 14050–51. http://dx.doi.org/10.1021/ja805091w.

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44

Son, Jong Keun, and Ronald W. Woodard. "Stereochemical mechanism of iodoacetic acid mediated decomposition of L-methionine to L-homoserine lactone." Journal of the American Chemical Society 111, no. 4 (1989): 1363–67. http://dx.doi.org/10.1021/ja00186a033.

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45

Lewis, Vincent E., William J. Donarski, James R. Wild, and Frank M. Raushel. "Mechanism and stereochemical course at phosphorus of the reaction catalyzed by a bacterial phosphotriesterase." Biochemistry 27, no. 5 (1988): 1591–97. http://dx.doi.org/10.1021/bi00405a030.

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46

Krause, Sandra T., Tobias G. Köllner, Julia Asbach, and Jörg Degenhardt. "Stereochemical mechanism of two sabinene hydrate synthases forming antipodal monoterpenes in thyme (Thymus vulgaris)." Archives of Biochemistry and Biophysics 529, no. 2 (2013): 112–21. http://dx.doi.org/10.1016/j.abb.2012.12.003.

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47

Jarling, René, Masih Sadeghi, Marta Drozdowska, et al. "Stereochemical Investigations Reveal the Mechanism of the Bacterial Activation of n-Alkanes without Oxygen." Angewandte Chemie International Edition 51, no. 6 (2011): 1334–38. http://dx.doi.org/10.1002/anie.201106055.

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48

Pericàs, Miquel A., Jaume Balsells, Jaume Castro, et al. "Toward the understanding of the mechanism and enantioselectivity of the PausonKhand reaction. Theoretical and experimental studies." Pure and Applied Chemistry 74, no. 1 (2002): 167–74. http://dx.doi.org/10.1351/pac200274010167.

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Abstract:

Semiempirical and density functional theory (DFT) calculations have been performed on the key steps of the commonly accepted mechanism of the PausonKhand reaction (PKR). In this context, the high reactivity of ynamine complexes in the cycloaddition process has been rationalized on the basis of an anomerically assisted dissociation of CO. Moreover, an explanation has been provided for the correlation between olefin strain and reactivity in the PKR. Inspired by these results, new selective syntheses of cyclopentanones and phenols based on PKR with cyclopropene have been developed. On the other

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49

Sono, Masakazu, Yukiko Nishibuchi, Norihito Yamaguchi, and Motoo Tori. "Cyclization into Hydrindanes Using Samarium Diiodide: Stereochemical Features Depending on the Protecting Group." Natural Product Communications 11, no. 8 (2016): 1934578X1601100. http://dx.doi.org/10.1177/1934578x1601100807.

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Monocyclic compounds bearing ketone and enone moieties in the same molecule can be cyclized to bicyclic compounds initiated by samarium diiodide. The stereochemistry of the products depended on the reaction conditions and also the protecting group of the hydroxy group existed in the molecule. A cyclization mechanism is discussed.

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Page, Michael I. "The Reactivity of β-Lactams, the Mechanism of Catalysis and the Inhibition of &#946-Lactamases". Current Pharmaceutical Design 5, № 11 (1999): 895–913. http://dx.doi.org/10.2174/1381612805666230112192319.

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Four membered -lactam rings do not show unusual reactivity compared with their acyclic amide analogues and there is no evidence of concerted mechanisms for nucleophilic substitution reactions at the carbonyl centre. The identity of the general base/acid catalyst in the serine &#946;-lactamases, which catalyse the hydrolysis of &#946;-lactams, is unknown. There are no ideal transition state analogue inhibitors for these enzymes which involve several intermediates and transition states. The class C serine &#946;-lactamase enhances the rate of phosphonylation of its active site serine

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