Log in

Relevant bibliographies by topics / 5-exo-trig / Journal articles

To see the other types of publications on this topic, follow the link: 5-exo-trig.

Journal articles on the topic '5-exo-trig'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic '5-exo-trig.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Long, Hao, Jinshuai Song, and Hai-Chao Xu. "Electrochemical synthesis of 7-membered carbocycles through cascade 5-exo-trig/7-endo-trig radical cyclization." Organic Chemistry Frontiers 5, no. 21 (2018): 3129–32. http://dx.doi.org/10.1039/c8qo00803e.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Nagano, Hajime, Yohko Ohtani, Eiko Odake, Junko Nakagawa, Yukie Mori, and Tomoko Yajima. "Tandem 5-Exo-dig-5-exo-trig Radical Cyclization leading to a 6,5-Ring Fused Carbobicycle possessing Two Contiguous Quaternary Carbons at the Bridgehead and its Adjacent Positions." Journal of Chemical Research 23, no. 5 (1999): 338–39. http://dx.doi.org/10.1177/174751989902300521.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Sivappa, Rasapalli, Vamshikrishna Reddy Sammeta, Yanchang Huang, James A. Golen, and Sergey N. Savinov. "Facile synthesis of 3-substituted imidazo[1,2-a]pyridines through formimidamide chemistry." RSC Advances 9, no. 51 (2019): 29659–64. http://dx.doi.org/10.1039/c9ra05841a.

Full text

Abstract:

A facile entry to 3-substituted imidazo[1,2-a]pyridines from halides and 2-amino pyridines via formimidamide chemistry has been developed through a formal anti-Baldwin 5-endo-trig cyclization that becomes a thermally allowed 5-exo-trig cyclization.

APA, Harvard, Vancouver, ISO, and other styles

4

Hollingworth, GJ, G. Pattenden, and DJ Schulz. "Cascade Radical Cyclization-Fragmentation-Transannular-Ring Expansion Reactions Involving Oximes. A New Approach to Synthesis of Angular Triquinanes." Australian Journal of Chemistry 48, no. 2 (1995): 381. http://dx.doi.org/10.1071/ch9950381.

Full text

Abstract:

Treatment of the acetylene-substituted cyclobutanone oxime ether (13) with (Me3Si)3SiH leads, in one pot, to the 5,6-bicyclic enone oxime (14) in 70% yield. It is suggested that the formation of (14) from (13) proceeds by way of a novel double ring expansion-transannulation process involving aminyl radical intermediates (see Scheme 3, below). By contrast, treatment of the cyclobutanone (3a) with Bu3SnH instead leads only to the product (11) of hydrostannylation of the acetylene unit in (3a). Neither (3a) nor (13) produced any of the expected bicyclo[3.3.0]octane products, viz. (5a) and (15), f

APA, Harvard, Vancouver, ISO, and other styles

5

Kurkutov, Evgeny O., and Bagrat A. Shainyan. "Iodine-Mediated Alkoxyselenylation of Alkenes and Dienes with Elemental Selenium." Molecules 27, no. 19 (2022): 6169. http://dx.doi.org/10.3390/molecules27196169.

Full text

Abstract:

A one-pot synthesis of linear and cyclic β-alkoxyselenides is developed through the iodine-mediated three-component reaction of elemental selenium with alkenes (dienes) and alcohols. Selenylation of 1,5-hexadiene gives 2,5-di(methoxymethyl)tetrahydroselenophene and 2-methoxy-6-(methoxymethyl)tetrahydro-2H-selenopyran via the 5-exo-trig and 6-endo-trig cyclization. 1,7-Octadiene affords only linear 1:2 adduct with two terminal double bonds. 1,5-Cyclooctadiene results in one diastereomer of 2,6-dialkoxy-9-selenabicyclo [3.3.1]nonanes via 6-exo-trig cyclization. With 1,3-diethenyl-1,1,3,3-tetrame

APA, Harvard, Vancouver, ISO, and other styles

6

Tănase, Constantin I., Constantin Drăghici, Sergiu Shova, Anamaria Hanganu, Emese Gal, and Cristian V. A. Munteanu. "A long-range tautomeric effect on a new Schiff isoniazid analogue, evidenced by NMR study and X-ray crystallography." New Journal of Chemistry 42, no. 17 (2018): 14459–68. http://dx.doi.org/10.1039/c8nj01680a.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Broggini, Gianluigi, Silvia Gazzola, Egle Beccalli, Tea Borelli, Carlo Castellano, and Daria Diamante. "Selective 7-endo-Cyclization of 3-Aza-5-alkenols through Oxidative Pd(II)-Catalyzed Olefin Oxyarylation." Synlett 29, no. 04 (2017): 503–8. http://dx.doi.org/10.1055/s-0036-1590939.

Full text

Abstract:

3-Aza-5-alkenols undergo selective 7-endo-trig cyclization when treated with a catalytic Pd(II) species, CuCl2 and ArSnBu3 giving 7-aryl-substituted oxazepanes. The intramolecular alkoxylation occurs with formation of a seven-membered ring only when associated with an arylating step. Otherwise, 6-exo-trig reactions, providing morpholine derivatives, were observed.

APA, Harvard, Vancouver, ISO, and other styles

8

Sun, Xi, Xu Dong, Yi Yang, et al. "Palladium-catalyzed cascade 5-exo-trig radical cyclization/aromatic C–H alkylation with unactivated alkyl iodides." Organic & Biomolecular Chemistry 19, no. 12 (2021): 2676–80. http://dx.doi.org/10.1039/d1ob00346a.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Makarov, Anton S., Alexander A. Fadeev, and Maxim G. Uchuskin. "Intramolecular iron-catalyzed transannulation of furans with O-acetyl oximes: synthesis of functionalized pyrroles." Organic Chemistry Frontiers 8, no. 23 (2021): 6553–60. http://dx.doi.org/10.1039/d1qo01281a.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Pradipta, Kumar Basu, and Ghosh Amrita. "Synthesis of -naphthol and -naphthol annulated heterocycles : Regioselective heterocyclization of 2-allylnaphthalene-1-ol and 1-allylnaphthalene-2-ol." Journal of Indian Chemical Society Vol. 91, Mar 2014 (2014): 575–79. https://doi.org/10.5281/zenodo.5717767.

Full text

Abstract:

Department of Chemistry, Hooghly Mohsin College, P.O. Chinsurah, Hooghly-712 101, West Bengal, India <em>E-mail </em>: pkbasu74@gmail.com <em>Fax</em> : 91-33-2681-0544 <em>Manuscript received online 24 April 2012, revised 04 June 2012, accepted 31 December 2012</em> 2-Allylnaphthalene-1-ol (1a) and 1-allylnaphthalene-2-ol (1b) undergo regioselective heterocyclization to give 5-<em>exo</em>-trig cyclized products 2a or 2b on treatment with pyridine hydrotribromide (3h); or hexamethylenetetramine hydrotribromide (2h); or elemental bromine in CHCl<sub>3</sub> (7 h); or N-bromosuccinimide in acet

APA, Harvard, Vancouver, ISO, and other styles

11

Sau, Sudip, and Prasenjit Mal. "3-Nitro-coumarin synthesis via nitrative cyclization of aryl alkynoates using tert-butyl nitrite." Chemical Communications 57, no. 73 (2021): 9228–31. http://dx.doi.org/10.1039/d1cc03415d.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Khosravi, Hormoz, Helya Janatian Ghazvini, Mohammad Kamangar, Frank Rominger, and Saeed Balalaie. "Migratory cycloisomerization of 1,3-dien-5-ynes conjugated with pseudopeptides in assembly of benzo[7]annulenes." Chemical Communications 58, no. 13 (2022): 2164–67. http://dx.doi.org/10.1039/d1cc06533e.

Full text

Abstract:

An unprecedented cylcoisomerization of 1,3-dien-5-ynes for the construction of 7H-benzo[7]annulenes through a transamidation/5-exo-trig cyclization/8π-electrocyclization has been reported. Mechanistic investigations were conducted via DFT calculation and experimentally support.

APA, Harvard, Vancouver, ISO, and other styles

13

Basu, Pradipta Kumar, and Amrita Ghosh. "Regioselective 5-exo-Trig Heterocyclization of 2-Allyl-1-naphthols under the Influence of N-Iodosuccinimide or Molecular Iodine in Aqueous Micelle." Organic Chemistry International 2012 (November 22, 2012): 1–7. http://dx.doi.org/10.1155/2012/810476.

Full text

Abstract:

Regioselective iodocyclization of a series of allylhydroxy naphthalene precursors involving N-iodosuccinimide and environment friendly green approach associated with surfactant-promoted molecular-iodine-mediated 5-exo-trig cyclization strategies has been explored.

APA, Harvard, Vancouver, ISO, and other styles

14

Lu, Nan, Chengxia Miao та Xiaozheng Lan. "Theoretical investigation on diastereoselective [2+2] cycloaddition and Pd-catalyzed enantioselective [3+2] cycloaddition for synthesis of cis-β-lactam and exo-furobenzopyranone". Thermal Science and Engineering 7, № 1 (2024): 5949. http://dx.doi.org/10.24294/tse.v7i1.5949.

Full text

Abstract:

The mechanism is investigated for Wolff rearrangement/Staudinger [2+2] cycloaddition cascade and Pd-catalyzed, decarboxylative, formal [3+2] cycloaddition. Wolff rearrangement of 3-diazotetramic acid is determined to be rate-limiting step generates cyclic acyl ketene. The interaction of ketene with imine firstly results in zwitterion followed by conrotatory cyclization giving major cis-β-lactam. For synthesis of s-VECs, the epoxidation−cyclization cascade and hydrolysis give precursor of better performing exocyclic derivative. The reaction with 3-cyanochromone includes decarboxylation, nucleop

APA, Harvard, Vancouver, ISO, and other styles

15

Liu, Bang, Ren-Jie Song, Xuan-Hui Ouyang, Yang Li, Ming Hu, and Jin-Heng Li. "Palladium-catalyzed oxidative 6-exo-trig cyclization of 1,6-enynes: facile synthesis of bicyclo[4.1.0]heptan-5-ones." Chemical Communications 51, no. 64 (2015): 12819–22. http://dx.doi.org/10.1039/c5cc04300j.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Bailey, William F., and Justin D. Fair. "Intramolecular carbolithiation cascades as a route to a highly strained carbocyclic framework: competition between 5-exo-trig ring closure and proton transfer." Beilstein Journal of Organic Chemistry 9 (March 14, 2013): 537–43. http://dx.doi.org/10.3762/bjoc.9.59.

Full text

Abstract:

The preparation of fairly strained carbocyclic ring systems by intramolecular 5-exo-trig ring closure has been well documented, and the absence of proton transfers that would compromise such cyclizations is a hallmark of this chemistry. In an effort to explore the limitations of this approach to more highly strained systems, the preparation of a stellane (tricyclo[3.3.0.03,7]octane) framework by an intramolecular carbolithiation cascade involving three coupled 5-exo-trig cyclizations of the vinyllithium derived from 2-bromo-4-vinyl-1,6-heptadiene by lithium–bromine exchange was investigated. T

APA, Harvard, Vancouver, ISO, and other styles

17

Kaliappan, K., and G. S. R. Subba Rao. "Tandem 5-exo-trig allyl and 3-exo-trig radical cyclisation and rearrangement to copa and ylanga type sesquiterpene skeleton." Chemical Communications, no. 20 (1996): 2331. http://dx.doi.org/10.1039/cc9960002331.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Ishibashi, Hiroyuki, Nobuyuki Nakamura, Tatsunori Sato, Michiyo Takeuchi та Masazumi Ikeda. "Radical cyclizations of N-vinylic α-chloroacetamides. 5-endo-trig and 4-exo-trig cyclizations". Tetrahedron Letters 32, № 14 (1991): 1725–28. http://dx.doi.org/10.1016/s0040-4039(00)74314-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Majumdar, K. C., P. Debnath, A. K. Pal, S. K. Chattopadhyay, and A. Biswas. "Radical-mediated cyclization reactions leading to spiro and [6,6]-fused heterocycles." Canadian Journal of Chemistry 85, no. 6 (2007): 445–52. http://dx.doi.org/10.1139/v07-046.

Full text

Abstract:

Regiochemical study of nBu3SnH–AIBN-mediated aryl-radical cyclization of different 3-(2-bromophenyl sul fenylmethyl)coumarins, 3-(2-bromophenylsulfonyl-methyl)coumarins, and 6-[(2-bromophenoxy)methyl]-4-methoxypyran-2-ones have been investigated with the formation of different [6,6]-fused and spirocylic heterocycles. The sulfides and ethers were prepared from 3-chloromethyl coumarin and 6-(bromomethyl)-4-methoxy pyran-2-one with different 2-bromothiophenol and 2-bromophenols under classical alkylation condition. The corresponding sulfones were prepared by oxidation of the sulfides with m-CPBA.

APA, Harvard, Vancouver, ISO, and other styles

20

Vepreva, Anastasia, Alexander Yanovich, Dmitry Dar’in, Grigory Kantin, Alexander Bunev, and Mikhail Krasavin. "A novel spirocyclic scaffold accessed via tandem Claisen rearrangement/intramolecular oxa-Michael addition." Beilstein Journal of Organic Chemistry 18 (December 6, 2022): 1649–55. http://dx.doi.org/10.3762/bjoc.18.177.

Full text

Abstract:

A straightforward access to novel spiro[benzofuran-2,3'-pyrrolidine]-2',5'-diones based on the Rh2(esp)2-catalyzed insertion of carbenes derived from diazo arylidene succinimides (DAS) into the O–H bond of phenols is described. The initial adducts underwent a thermally promoted Claisen rearrangement followed by DABCO-catalyzed intramolecular 5-exo-trig oxa-Michael addition.

APA, Harvard, Vancouver, ISO, and other styles

21

Wang, Wanwan, and Lei Yu. "Synthesis of Indenones via Persulfate Promoted Radical Alkylation/Cyclization of Biaryl Ynones with 1,4-Dihydropyridines." Molecules 29, no. 2 (2024): 458. http://dx.doi.org/10.3390/molecules29020458.

Full text

Abstract:

The oxidative radical cascade cyclization of alkynes has emerged as a versatile strategy for the efficient construction of diverse structural units and complex molecules in organic chemistry. This work reports an alkyl radical initiated 5-exo-trig cyclization of biaryl ynones with 1,4-dihydropyridines to selectively synthesize indenones.

APA, Harvard, Vancouver, ISO, and other styles

22

Ishibashi, Hiroyuki, Issei Kato, Yoshifumi Takeda, Momoyo Kogure, and Osamu Tamura. "6-Endo-trig and 5-exo-trig selective aryl radical cyclisations of N-(o-bromobenzyl) enamides." Chemical Communications, no. 16 (2000): 1527–28. http://dx.doi.org/10.1039/b003790g.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Giofrè, Sabrina, Egle M. Beccalli, Francesca Foschi, Concetta La Rosa, Leonardo Lo Presti, and Michael S. Christodoulou. "Chemo- and Regioselective Palladium(II)-Catalyzed Aminoarylation of N-Allylureas Providing 4-Arylmethyl Imidazolidinones." Synthesis 51, no. 18 (2019): 3462–70. http://dx.doi.org/10.1055/s-0037-1611539.

Full text

Abstract:

The aminoarylation reaction of N-allylureas under oxidative palladium catalysis, in the absence of ligands and by using inexpensive H2O2 as the sole oxidant, occurs in a chemo- and regioselective fashion. This intramolecular process takes place via a 5-exo-trig cyclization, and represents an easy approach to 4-arylmethyl imidazolidinones.

APA, Harvard, Vancouver, ISO, and other styles

24

KALIAPPAN, K., and G. S. R. S. RAO. "ChemInform Abstract: Tandem 5-exo-trig Allyl and 3-exo-trig Radical Cyclization and Rearrangement to Copa and Ylanga Type Sesquiterpene Skeleton." ChemInform 28, no. 11 (2010): no. http://dx.doi.org/10.1002/chin.199711159.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Lopez, JC, AM Gomez та B. Fraserreid. "Cyclization Reactions of Tethered Radicals Derived From 4-O-Substituted α-D-erythro-Octa-2,6-dienopyranosides: Stereoselective Access to Carbocycles and Branched-Chain Sugars". Australian Journal of Chemistry 48, № 2 (1995): 333. http://dx.doi.org/10.1071/ch9950333.

Full text

Abstract:

The chemo- and stereo- selectivities in the cyclization of tethered radicals, derived from α-D-erythro-octa-2,6-dienopyranosides, in which there is competition between 5-exo and 6-exo ring closures, have been examined. Use of silicon tethers resulted in a preferred 6-exo-trig addition. However, tethered mixed iodo acetals have shown an unprecedented relation between the stereogenic centre in the acetal and the preferred addition pathway. In addition, changes in the oxidation state at the termini of the olefins have a profound effect upon site selectivity, thus leading to 3-deoxy 3-C-substitute

APA, Harvard, Vancouver, ISO, and other styles

26

Chen, Dianpeng, Jianming Li, Yingying Shan, et al. "Halogen-Radical-Promoted Dearomative Aza-Spirocyclization of Alkynylimines: An Efficient Approach to 3-Halo-Spirocyclohexadienones." Synthesis 52, no. 04 (2019): 609–18. http://dx.doi.org/10.1055/s-0039-1690746.

Full text

Abstract:

A novel halogen-radical-promoted dearomative aza-spirocyclization of alkynylimines for the synthesis of 3-halo-spirocyclohexadienones is described. In this process, it is believed that a radical addition, 5-exo-trig cyclization, and dearomative aza-spirocyclization are involved. Easily available starting materials, mild conditions, and a wide substrate scope make this approach potentially useful.

APA, Harvard, Vancouver, ISO, and other styles

27

Hayashi, Ryuji, and Gregory R. Cook. "Bi(OTf)3-catalyzed 5-exo-trig cyclization via halide activation." Tetrahedron Letters 49, no. 24 (2008): 3888–90. http://dx.doi.org/10.1016/j.tetlet.2008.04.067.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Koy, Maximilian, Keary M. Engle, Lawrence M. Henling, Michael K. Takase, and Robert H. Grubbs. "Synthesis of Substituted Dihydrobenzofurans via Tandem SNAr/5-Exo-Trig Cyclization." Organic Letters 17, no. 8 (2015): 1986–89. http://dx.doi.org/10.1021/acs.orglett.5b00743.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

ISHIBASHI, H., N. NAKAMURA, T. SATO, M. TAKEUCHI та M. IKEDA. "ChemInform Abstract: Radical Cyclizations of N-Vinylic α-Chloroacetamides. 5-endo- Trig and 4-exo-Trig Cyclizations." ChemInform 23, № 3 (2010): no. http://dx.doi.org/10.1002/chin.199203103.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Joyce, Liam M., Anthony C. Willis, Christopher J. T. Hyland та Stephen G. Pyne. "Gold- and Silver-Catalysed Cyclisation Reactions of β-Amino Allenes". Australian Journal of Chemistry 71, № 9 (2018): 682. http://dx.doi.org/10.1071/ch18197.

Full text

Abstract:

Herein we report the formation of pyrrolines and tetrahydropyridines from the cyclisation reactions of β-amino allenes by both AuI and AgI catalysts in yields ranging from 5 to 70 %. AuI catalysts favour a 5-endo-dig cyclisation before rapid rearrangement to the 5-exo-dig product, while AgI favours a 6-endo-trig cyclisation. We also report the first known Ag2O catalysed cyclisation reaction of an allene which occurred in good yield (61 %).

APA, Harvard, Vancouver, ISO, and other styles

31

Chatgilialoglu, Chryssostomos, Carla Ferreri, Marco Lucarini, Alessandro Venturini, and Andreas A. Zavitsas. "5-exo-trig Versus 6-endo-trig Cyclization of Alk-5-enoyl Radicals: The Role of One-Carbon Ring Expansion." Chemistry - A European Journal 3, no. 3 (2006): 376–87. http://dx.doi.org/10.1002/chem.19970030309.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Ishibashi, Hiroyuki, Issei Kato, Yoshifumi Takeda, Momoyo Kogure, and Osamu Tamura. "ChemInform Abstract: 6-Endo-trig and 5-exo-trig Selective Aryl Radical Cyclizations of N-(o-Bromobenzyl) Enamides." ChemInform 31, no. 47 (2000): no. http://dx.doi.org/10.1002/chin.200047050.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Batistatos, Michalis, Manolis A. Fousteris, Sotiris S. Nikolaropoulos, Jean Le Bras, and Jacques Muzart. "Selective 5-exo-trig Iodocyclization of N-tosyl-2-allylanilines in Water." Letters in Organic Chemistry 7, no. 6 (2010): 440–43. http://dx.doi.org/10.2174/157017810791824829.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Rodríguez, Verónica, Leticia Quintero, and Fernando Sartillo-Piscil. "Stereoselective 5-exo-trig radical cyclization in the enantioselective synthesis of Pregabalin." Tetrahedron Letters 48, no. 24 (2007): 4305–8. http://dx.doi.org/10.1016/j.tetlet.2007.04.054.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Vaskevych, Alla I., Nataliia O. Savinchuk, Ruslan I. Vaskevych, Eduard B. Rusanov, Oleksandr O. Grygorenko, and Mykhailo V. Vovk. "The PIFA-initiated oxidative cyclization of 2-(3-butenyl)quinazolin-4(3H)-ones – an efficient approach to 1-(hydroxymethyl)-2,3-dihydropyrrolo[1,2-a]quinazolin-5(1H)-ones." Beilstein Journal of Organic Chemistry 17 (November 25, 2021): 2787–94. http://dx.doi.org/10.3762/bjoc.17.189.

Full text

Abstract:

A regioselective method for the synthesis of 1-(hydroxymethyl)-2,3-dihydropyrrolo[1,2-a]quinazolin-5(1H)-ones – close structural analogs of naturally occurring vasicinone alkaloids – is described. The procedure is based on PIFA-initiated oxidative 5-exo-trig cyclization of 2-(3-butenyl)quinazolin-4(3Н)-ones, in turn prepared by thermal cyclocondensation of the corresponding 2-(pent-4-enamido)benzamides. The products obtained have a good natural product likeness (NPL) score and therefore can be useful for the design of natural product-like compound libraries.

APA, Harvard, Vancouver, ISO, and other styles

36

Clayden, Jonathan, David W. Watson, Madeleine Helliwell та Mark Chambers. "β-Lactams or γ-lactams by 4-exo-trig or 5-endo-trig anionic cyclisation of lithiated acrylamide derivatives". Chem. Commun., № 20 (2003): 2582–83. http://dx.doi.org/10.1039/b308029c.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Srikrishna, A., and P. Hemmalini. "Radical cyclisation strategies to bridged systems. Regioselective construction of chiral bicyclo [2.2.2] and [3.2.1] octanes via 6-exo trig and 5-exo trig radical cyclisation reactions." Tetrahedron 48, no. 42 (1992): 9337–54. http://dx.doi.org/10.1016/s0040-4020(01)85623-4.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Malone, Aoife, and Eoin M. Scanlan. "Applications of 5-exo-trig Thiyl Radical Cyclizations for the Synthesis of Thiosugars." Journal of Organic Chemistry 78, no. 21 (2013): 10917–30. http://dx.doi.org/10.1021/jo401900e.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Hartung, Jens, Kristina Daniel, Christian Rummey, and Gerhard Bringmann. "On the stereoselectivity of 4-penten-1-oxyl radical 5-exo-trig cyclizations." Organic & Biomolecular Chemistry 4, no. 22 (2006): 4089. http://dx.doi.org/10.1039/b611473c.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Koy, Maximilian, Keary M. Engle, Lawrence M. Henling, Michael K. Takase, and Robert H. Grubbs. "ChemInform Abstract: Synthesis of Substituted Dihydrobenzofurans via Tandem SNAr/5-exo-trig Cyclization." ChemInform 46, no. 30 (2015): no. http://dx.doi.org/10.1002/chin.201530147.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Zhang, Hanyang, Wen Liu, Jiale Hu, Qian Zhang, Zeguo Fang та Dong Li. "Copper-Catalyzed Trifluoromethylthiolaton and Radical Cyclization of N-Phenylpent-4-Enamides to Construct SCF3-Substituted γ-Lactams". Catalysts 14, № 11 (2024): 797. http://dx.doi.org/10.3390/catal14110797.

Full text

Abstract:

An efficient method involving copper-catalyzed trifluoromethylthiolation and radical cyclization of N-phenylpent-4-enamides using readily available and stable AgSCF3 as the trifluoromethylthiolating reagent is described. The method enables the synthesis of a series of potential medicinally valuable trifluoromethylthio-substituted γ-lactams and relative 2-oxazolidinone derivatives with broad functional group compatibility. Mechanistic investigations indicated that this reaction involved amidyl radical-initiated cascade 5-exo-trig cyclization followed by trifluoromethylthiolation, resulting in t

APA, Harvard, Vancouver, ISO, and other styles

42

Ikeda, Masazumi, Shinji Ohtani, Taeka Yamamoto, Tatsunori Sato, and Hiroyuki Ishibashi. "Regiochemistry in radical cyclisations (4-exo-trig versus 5-endo-trig) of 2-halo-N-(3,4-dihydro-2-naphthyl)acetamides." Journal of the Chemical Society, Perkin Transactions 1, no. 11 (1998): 1763–68. http://dx.doi.org/10.1039/a801714j.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Gharpure, Santosh, P. Niranjana, and Suheel Porwal. "Cascade Radical Cyclization to Vinylogous Carbonates/Carbamates for the Synthesis of Oxa- and Aza-Angular Triquinanes: Diastereoselectivity Depends on the Ring Size of Radical Precursor." Synthesis 50, no. 15 (2018): 2954–67. http://dx.doi.org/10.1055/s-0036-1589541.

Full text

Abstract:

An efficient strategy was developed for the stereoselective construction of oxa- and aza-angular triquinanes employing a cascade 5-exo-trig radical cyclization to vinylogous carbonates and carbamates. The radical precursors are readily prepared from 2-(hydroxymethyl)cyclopentenone/cyclohexenones. High diastereoselectivity is observed for the formation of angular oxa- and azatriquinanes. Diastereoselectivity drops when six-membered radical precursors are used. The strategy is found to be useful to incorporate synthetically challenging moieties such as spiroindoline, lactone-bearing, and uracil-

APA, Harvard, Vancouver, ISO, and other styles

44

Gurjar, Mukund K., S. V. Ravindranadh, and Punit Kumar. "5-Exo-dig, 5-exo-trig cascade radical cyclisation on sugar-furanose templates: entry to angularly fused oxa- and dioxa-triquinane skeletons." Chemical Communications, no. 10 (2001): 917–18. http://dx.doi.org/10.1039/b101641p.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Della, EW, and AM Knill. "A Theoretical and Experimental Investigation of the Kinetics of Ring Closure of the 3-Methyl-3-azahex-5-enyl Radical." Australian Journal of Chemistry 48, no. 12 (1995): 2047. http://dx.doi.org/10.1071/ch9952047.

Full text

Abstract:

Evaluation of the Arrhenius parameters for ring closure of the 3-methyl-3-azahex-5-enyl radical is reported. Cyclization of the radical is found to occur with high regioselectivity giving the exo -trig product exclusively with an activation energy of 22 kJ mol-1 and log A value of 11.1. The experimental activation barrier compares favourably with that determined by force field calculations which predict a value of 21 kJ mol-1. The 3-methyl-3-azahex-5-enyl radical is therefore found to undergo ring closure some 70 times faster than the parent hex-5-enyl radical, in accord with predictions based

APA, Harvard, Vancouver, ISO, and other styles

46

Che, C. M., and C. Y. Zhou. "Gold-Catalyzed Synthesis of Pyrrolidones by an 5- and 6-exo-trig Cycloaddition Reaction." Synfacts 2007, no. 7 (2007): 0686. http://dx.doi.org/10.1055/s-2007-968676.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Verma, Nishant, Sumit Kumar, and Naseem Ahmed. "Asymmetric synthesis of 3-benzofuranones through 5-exo-trig cyclization of 4-nitroaryl olefins." Tetrahedron Letters 57, no. 31 (2016): 3547–50. http://dx.doi.org/10.1016/j.tetlet.2016.06.118.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Hao, Wen-Juan, Yan Du, Dan Wang, et al. "Catalytic Diazosulfonylation of Enynals toward Diazoindenes via Oxidative Radical-Triggered 5-exo-trig Carbocyclizations." Organic Letters 18, no. 8 (2016): 1884–87. http://dx.doi.org/10.1021/acs.orglett.6b00655.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Hartung, Jens, and Thomas Gottwald. "On the 6- exo - trig ring closure of substituted 5-hexen-1-oxyl radicals." Tetrahedron Letters 45, no. 29 (2004): 5619–21. http://dx.doi.org/10.1016/j.tetlet.2004.05.131.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Agafonova, Anastasiya V., Ilia A. Smetanin, Nikolai V. Rostovskii, Alexander F. Khlebnikov, and Mikhail S. Novikov. "Expedient synthesis of 3-hydroxypyrrolesviaBu3SnH-triggered ionic 5-exo-trig-cyclization of 5-chloro-3-azamuconoate derivatives." Organic Chemistry Frontiers 5, no. 23 (2018): 3396–401. http://dx.doi.org/10.1039/c8qo00982a.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!