Log in

Relevant bibliographies by topics / N,o-acetal / Journal articles

To see the other types of publications on this topic, follow the link: N,o-acetal.

Journal articles on the topic 'N,o-acetal'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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 'N,o-acetal.'

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

Kantlehner, Willi, Birgit Heckel, and Jochen Mezger. "Orthoamide und Iminiumsalze, CI. Umsetzungen von N,N,N′,N′-Tetramethylharnstoffdiethylacetal mit CH2-aciden Verbindungen." Zeitschrift für Naturforschung B 75, no. 9-10 (2020): 865–80. http://dx.doi.org/10.1515/znb-2020-0072.

Full text

Abstract:

AbstractN,N,N′,N′-Tetramethylurea diethylacetal reacts with CH2-acidic compounds as benzylcyanide, cyanoacetic acid derivatives malonodinitrile and nitromethane to give ketene aminals or ketene-O,N-acetales. Low polar solvents favour mostly the formation of ketenaminals. The yields of ketenaminals and ketene-O,N-acetals can be improved in some cases by addition of trimethylsilyldimethylamine. The reactions of the urea acetal with diethylmalonate, ore acetyl acetone, stops at the stage of the N,N′,N″-permethylated guanidinium salts with carbanionic counterions. The formation of bis(dimethylamin

APA, Harvard, Vancouver, ISO, and other styles

2

Kim, Minjun, Jaebong Jang, Goyoung Choi та ін. "Conversion of Medium-Sized Lactams to α-Vinyl or α-Acetylenyl Azacycles via N,O-Acetal TMS Ethers". Molecules 23, № 11 (2018): 3023. http://dx.doi.org/10.3390/molecules23113023.

Full text

Abstract:

α-Vinyl or α-acetylenyl azacycles were easily synthesized from 7- to 9-membered lactams and 6- to 9-membered lactams via N,O-acetal trimethylsilyl (TMS) ethers. Organocopper and organostannane reagents afforded reasonable yields for the respective N-acyliminium ion vinylation and acetylenylation intermediates generated from N,O-acetal TMS ethers in the presence of a Lewis acid.

APA, Harvard, Vancouver, ISO, and other styles

3

MASLINSKA-SOLICH, JOLANTA, EDYTA GIBAS, and SYLWIA KUKOWKA. "The formation of macrocyclic compounds with O,O- and O,N-acetal units." Polimery 50, no. 07/08 (2005): 509–19. http://dx.doi.org/10.14314/polimery.2005.509.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Maslov, M. A., N. G. Morosova, I. M. Senan, and G. A. Serebrennikova. "Synthesis of cationic lipid transfection agents with O,O- or N,O-acetal linkages." Russian Journal of Bioorganic Chemistry 35, no. 5 (2009): 628–32. http://dx.doi.org/10.1134/s1068162009050148.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Lee, Won-Il, Jong-Wha Jung, Jaebong Jang, Hwayoung Yun, and Young-Ger Suh. "Synthesis of 5,6-dihydrophenanthridines via N,O-acetal TMS ethers." Tetrahedron Letters 54, no. 38 (2013): 5167–71. http://dx.doi.org/10.1016/j.tetlet.2013.07.037.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Wang, Pengcheng, Ruirui Yu, Sajjad Ali, et al. "Silver Catalyzed Decarbonylative [3 + 2] Cycloaddition of Cyclobutenediones and Formamides." Molecules 26, no. 10 (2021): 2974. http://dx.doi.org/10.3390/molecules26102974.

Full text

Abstract:

As an important moiety in natural products, N,O-acetal has attracted wide attention in the past few years. An efficient method to construct N,O-acetal has been developed. Using silver catalyst, cyclobutenediones were smoothly converted to the corresponding γ-aminobutenolides in the presence of formamides, in which cyclobutenediones likely proceed with a key decarbonylative [3 + 2] cycloaddition process. In this way, a series of products with varied substituents were isolated in moderate yield and fully characterized.

APA, Harvard, Vancouver, ISO, and other styles

7

van der Pijl, Ferdi, Floris L. van Delft, and Floris P. J. T. Rutjes. "Synthesis and functionalization of bicyclic N,O-acetal scaffolds from furfural." Bioorganic & Medicinal Chemistry 23, no. 11 (2015): 2721–29. http://dx.doi.org/10.1016/j.bmc.2014.12.045.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Qiu, Xianfan, Liugen Xu, Shuxia Wang, et al. "Copper-catalyzed borylative aminomethylation of C–C double and triple bonds with N,O-acetal." Chemical Communications 57, no. 26 (2021): 3279–82. http://dx.doi.org/10.1039/d1cc00093d.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Ibrahim, Sherif M. S., Koushik Banerjee, Kara A. Slater, and Gregory K. Friestad. "A Tamao–Fleming oxidation route to dipeptides bearing N,O-acetal functionality." Tetrahedron Letters 58, no. 52 (2017): 4864–66. http://dx.doi.org/10.1016/j.tetlet.2017.11.036.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Lee, Won-Il, Jong-Wha Jung, Jaebong Jang, Jaebong Yun, Hwayoung Yun, and Young-Ger Suh. "ChemInform Abstract: Synthesis of 5,6-Dihydrophenanthridines via N,O-Acetal TMS Ethers." ChemInform 45, no. 3 (2014): no. http://dx.doi.org/10.1002/chin.201403180.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Kimatrai, M., O. Cruz-Lopez, M. E. Garcia-Rubino, F. Morales, V. Gomez-Perez, and J. M. Campos. "Neighboring-Group Participation Involving the Oxygen Atom of the O,O- or O,N-acetal Functional Groups." Current Organic Chemistry 14, no. 14 (2010): 1461–77. http://dx.doi.org/10.2174/138527210791616777.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Krasnaya, Zh A., Yu V. Smirnova, and V. S. Bogdanov. "Reaction of dimethylaminomethylenemalonaldehyde bis-N,O-acetal with ketones. A novel route to N-methylpyrroles." Chemistry of Heterocyclic Compounds 32, no. 5 (1996): 560–67. http://dx.doi.org/10.1007/bf01164785.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Möhrle, Hans, and Heinz Dwuletzki. "Lactam-acetale als potentielle Enamin-Synthone in Heterocyclensynthesen, 1. Das Lactam-acetal/Keten-N,O-acetal-System in 1,3-dipolarer Cycloaddition." Chemische Berichte 119, no. 12 (1986): 3591–99. http://dx.doi.org/10.1002/cber.19861191208.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Li, Ji-Yao, Zhi-Long Li, Wei-Wei Zhao, Yan-Kai Liu, Zhi-Ping Tong, and Rui Tan. "One-pot, highly efficient, asymmetric synthesis of ring-fused piperidine derivatives bearing N,O- or N,N-acetal moieties." Organic & Biomolecular Chemistry 14, no. 8 (2016): 2444–53. http://dx.doi.org/10.1039/c5ob02571k.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Zhang, Yan-Hui, Rong Liu, and Bo Liu. "Total synthesis of nannocystin Ax." Chemical Communications 53, no. 40 (2017): 5549–52. http://dx.doi.org/10.1039/c7cc00469a.

Full text

Abstract:

Total synthesis of nannocystin Ax has been accomplished concisely. The key elements in this total synthesis feature Kobayashi's remote asymmetric induction with vinylketene silyl N,O-acetal, Roush's asymmetric crotylboration of aldehyde, Mitsunobu's esterification and macrocyclization via Stille cross-coupling.

APA, Harvard, Vancouver, ISO, and other styles

16

Martens, Thierry, Florence Souquet та Jacques royer. "Anodic oxidation of the N-cyanomethyl-oxazolidine system: Regioselective chlorination α to the N,O-acetal function". Tetrahedron Letters 35, № 37 (1994): 6879–82. http://dx.doi.org/10.1016/0040-4039(94)85030-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Hosokawa, Seijiro, and Haruka Sato. "Synthesis of the C1–C17 Segment of Bafilomycin N." Synlett 30, no. 05 (2019): 577–80. http://dx.doi.org/10.1055/s-0037-1611727.

Full text

Abstract:

The C1–C17 segment of bafilomycin N has been synthesized. The C1–C11 segment was synthesized by the anti-selective vinylogous Mukaiyama aldol reaction with a chiral vinylketene silyl N,O-acetal and the Horner–Wadsworth–Emmons reaction, whereas C12–C17 was constructed by the syn-selective vinylogous Mukaiyama aldol reaction and the Jung’s semipinacol rearrangement. Those segments were connected by the Stille coupling to afford the C1–C17 segment.

APA, Harvard, Vancouver, ISO, and other styles

18

De Silva, Hondamuni I., Yingquan Song, William P. Henry, and Charles U. Pittman. "Ring size and substituent steric effects in cyclic ketene-N,O/S-acetal trifluoroacetylations." Tetrahedron Letters 53, no. 24 (2012): 2965–70. http://dx.doi.org/10.1016/j.tetlet.2012.03.068.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Ohsawa, Kosuke, Shota Ochiai, Junya Kubota, and Takayuki Doi. "Gold-Catalyzed Amide/Carbamate-Linked N,O-Acetal Formation with Bulky Amides and Alcohols." Journal of Organic Chemistry 86, no. 1 (2020): 1281–91. http://dx.doi.org/10.1021/acs.joc.0c02640.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Huang, Yung-tzung, and Kevin D. Moeller. "Anodic cyclization reactions: probing the chemistry of N,O-ketene acetal derived radical cations." Tetrahedron 62, no. 27 (2006): 6536–50. http://dx.doi.org/10.1016/j.tet.2006.04.009.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Xi, Xin, Ximei Zhao, Feng Zhu та ін. "Synthesis and Insecticidal Activity of β-Dihydroagarofuran Acetal Derivatives". Natural Product Communications 13, № 4 (2018): 1934578X1801300. http://dx.doi.org/10.1177/1934578x1801300404.

Full text

Abstract:

To search for improved insecticidal compounds based on β-dihydroagarofuran sesquiterpenoids, forty-four β-dihydroagarofuran acetal derivatives were designed and synthesized. Insecticidal activities and structure-activity relationship of these target compounds were evaluated. Some of the newly synthesized β-dihydroagarofuran acetal compounds were found to show higher insecticidal activity against sixth-instar larvae of Mythimna separate. Especially, compounds 2.2.9, 2.2.10, 2.2.11, 2.3.4, 2.3.6, 2.3.7, 2.5.4, 2.5.7 had great insecticidal activities with lower LD50 than that of the positive cont

APA, Harvard, Vancouver, ISO, and other styles

22

Sagawa, Naoya, Hiroki Moriya, and Seijiro Hosokawa. "Syn Selective Vinylogous Mukaiyama Aldol Reaction Using Z,E-Vinylketene N,O-Acetal with Acetals." Organic Letters 19, no. 1 (2016): 250–53. http://dx.doi.org/10.1021/acs.orglett.6b03549.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Song, Yingquan, Hondamuni I. De Silva, William P. Henry, Guozhong Ye, Sabornie Chatterjee, and Charles U. Pittman. "Regiochemistry of an ambident cyclic ketene-N,O-acetal nucleophile and its anion toward electrophiles." Tetrahedron Letters 52, no. 35 (2011): 4507–11. http://dx.doi.org/10.1016/j.tetlet.2011.06.023.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Weaver, Matthew J., Michael J. Campbell, Chun Li, and Nicholas R. Natale. "Ethyl 5-methyl-3-[11-(pyridin-2-yl)-6,11-dihydro-6,11-epoxydibenzo[b,e]oxepin-6-yl]isoxazole-4-carboxylate: a bicyclic acetal from the rearrangement of an anthracenyl isoxazole." Acta Crystallographica Section E Crystallographic Communications 76, no. 12 (2020): 1818–22. http://dx.doi.org/10.1107/s2056989020014358.

Full text

Abstract:

The title compound, C26H20N2O5, is a rearrangement product of an o-pyridinyl anthracenyl isoxazole ester. It features a bicyclic acetal structure, which has two extended almost co-planar ring systems, which subtend a fold angle of 102.17 (5)°. In the crystal, the molecules are closely knitted together through C—H...N and C—H...O hydrogen bonds and form chains of alternating enantiomers propagating along the c-axis direction.

APA, Harvard, Vancouver, ISO, and other styles

25

Marsh, R. E., W. P. Schaefer, K. L. Widdowson, and A. G. Myers. "Structure of an anti-aldol addition product of benzaldehyde and a pseudoephedrine-derived O-silyl ketene N,O-acetal." Acta Crystallographica Section C Crystal Structure Communications 48, no. 11 (1992): 1948–51. http://dx.doi.org/10.1107/s0108270192002233.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Marsh, R. E., W. P. Schaefer, S. E. Kephart, and A. G. Myers. "Structure of a syn-aldol addition product of benzaldehyde and a prolinol-derived O-silacyclopentyl ketene N,O-acetal." Acta Crystallographica Section C Crystal Structure Communications 49, no. 1 (1993): 185–88. http://dx.doi.org/10.1107/s0108270192008825.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Oppolzer, Wolfgang, Christian Starkemann, Inès Rodriguez, and Gérald Bernardinelli. "Enantiomerically pure, crystalline ‘anti’-aldols from N-acylbornanesultams: aldolization and structure of intermediate t-butyldimethylsilyl-N,O-ketene acetal." Tetrahedron Letters 32, no. 1 (1991): 61–64. http://dx.doi.org/10.1016/s0040-4039(00)71218-4.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

MARTENS, T., F. SOUQUET та J. ROYER. "ChemInform Abstract: Anodic Oxidation of the N-Cyanomethyl-oxazolidine System: Regioselective Chlorination α to the N,O-Acetal Function." ChemInform 26, № 7 (2010): no. http://dx.doi.org/10.1002/chin.199507079.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Yanai, Hikaru, and Takeo Taguchi. "Novel defluorinative alkylation of trifluoroacetaldehyde N,O-acetal derivatives and its application to multi-component reaction." Chem. Commun., no. 9 (2009): 1034–36. http://dx.doi.org/10.1039/b817599c.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Suh, Young-Ger, Jaebong Jang, Hwayoung Yun, et al. "ChemInform Abstract: Expedient Synthesis of Chiral Homoallylamines via N,O-Acetal TMS Ethers and Its Application." ChemInform 43, no. 12 (2012): no. http://dx.doi.org/10.1002/chin.201212064.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

TSUKAMOTO, T., та T. KITAZUME. "ChemInform Abstract: Lewis Acid-Promoted Reaction of β,β-Difluorinated N,O-Acetal with Silylated Nucleophiles." ChemInform 24, № 11 (2010): no. http://dx.doi.org/10.1002/chin.199311098.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Mukaeda, Yuki, Takuya Kato, and Seijiro Hosokawa. "ChemInform Abstract: Syn-Selective Kobayashi Aldol Reaction Using the E,E-Vinylketene Silyl N,O-Acetal." ChemInform 44, no. 11 (2013): no. http://dx.doi.org/10.1002/chin.201311035.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Grindley, T. Bruce, and Srihari Kusuma. "Kinetic benzylidenation. Part II. Rearrangement of the kinetic products from benzylidenation of aldose diethyl dithioacetals." Canadian Journal of Chemistry 64, no. 12 (1986): 2397–403. http://dx.doi.org/10.1139/v86-396.

Full text

Abstract:

Terminal five-membered O-benzylidene derivatives of aldose diethyl dithioacetals can be rearranged at room temperature in N,N-dimethylformamide, often in high yields. Derivatives with the arabino configuration for their three terminal secondary hydroxyl groups, i.e. D-glucose, D-mannose, and D-arabinose derivatives, rearranged to structures containing terminal six-membered O-benzylidene rings. 4,5-O-Benzylidene-D-ribose diethyl dithioacetal rearranged chiefly to the 2,4 isomer, which was obtained by crystallization. Chromatography yielded some of the 3,5 isomer. 5,6-O-Benzylidene-D-galactose d

APA, Harvard, Vancouver, ISO, and other styles

34

Pingali, Subramanya, James P. Donahue, and Florastina Payton-Stewart. "Weak C—H...X(X= O, N) hydrogen bonds in the crystal structure of dihydroberberine." Acta Crystallographica Section C Structural Chemistry 70, no. 4 (2014): 388–91. http://dx.doi.org/10.1107/s2053229614003751.

Full text

Abstract:

Dihydroberberine (systematic name: 9,10-dimethoxy-6,8-dihydro-5H-1,3-dioxolo[4,5-g]isoquinolino[3,2-a]isoquinoline), C20H19NO4, a reduced form of pharmacologically important berberine, crystallizes from ethanol without interstitial solvent. The molecule shows a dihedral angle of 27.94 (5)° between the two arene rings at the ends of the molecule, owing to the partial saturation of the inner quinolizine ring system. Although lacking classical O—H or N—H donors, the packing in the crystalline state is clearly governed by C—H...N and C—H...O hydrogen bonds involving the two acetal-type C—H bonds o

APA, Harvard, Vancouver, ISO, and other styles

35

MARSH, R. E., W. P. SCHAEFER, K. L. WIDDOWSON, and A. G. MYERS. "ChemInform Abstract: Structure of an anti-Aldol Addition Product of Benzaldehyde and a Pseudoephedrine-Derived O-Silyl Ketene N,O-Acetal." ChemInform 24, no. 9 (2010): no. http://dx.doi.org/10.1002/chin.199309031.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

OPPOLZER, W., C. STARKEMANN, I. RODRIGUEZ, and G. BERNARDINELLI. "ChemInform Abstract: Enantiomerically Pure, Crystalline ′Anti′-Aldols from N- Acylbornanesultams Aldolization, and Structure of Intermediate t- Butyldimethylsilyl N,O-Ketene Acetal." ChemInform 22, no. 49 (2010): no. http://dx.doi.org/10.1002/chin.199149061.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Lan, Jin, Zongbo Xie, Jiangnan Yang, Jia Meng, Yishuai Liu, and Zhanggao Le. "One-Pot Multi-component Synthesis of N,O-Acetal Compounds Catalyzed by D-Proline at Room Temperature." Chinese Journal of Organic Chemistry 40, no. 5 (2020): 1331. http://dx.doi.org/10.6023/cjoc201911010.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Jung, Jong-Wha, Dong-Yun Shin, Seung-Yong Seo, et al. "A new entry to functionalized cycloalkylamines: diastereoselective intramolecular amidoalkylation of N,O-acetal TMS ether possessing allylsilane." Tetrahedron Letters 46, no. 4 (2005): 573–75. http://dx.doi.org/10.1016/j.tetlet.2004.11.136.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Suh, Young-Ger, Seok-Ho Kim, Jae-Kyung Jung та Dong-Yun Shin. "The versatile conversion of lactams to the α-alkylated azacycles via cyclic N,O-acetal TMS ether". Tetrahedron Letters 43, № 17 (2002): 3165–67. http://dx.doi.org/10.1016/s0040-4039(02)00459-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Sudo, Atsushi, Ryoichi Kudoh, Hiroshi Nakayama, Kazuya Arima, and Takeshi Endo. "Selective Formation of Poly(N,O-acetal) by Polymerization of 1,3-Benzoxazine and Its Main Chain Rearrangement." Macromolecules 41, no. 23 (2008): 9030–34. http://dx.doi.org/10.1021/ma8013178.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Möhrle, Hans, and Heinz Dwuletzki. "Lactam-acetale als potentielle Enamin-Synthone in Heterocyclensynthesen, 2. Das Lactam-acetal/Keten-N,O-acetal-System in der [4 + 2]-Diels-Alder-Reaktion mit inversem Elektronenbedarf." Chemische Berichte 119, no. 12 (1986): 3600–3606. http://dx.doi.org/10.1002/cber.19861191209.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Nakamura, Tatsuya, Kei Kubota, Takanori Ieki, and Seijiro Hosokawa. "Stereoselective Alkylation of the Vinylketene Silyl N,O-Acetal and Its Application to the Synthesis of Mycocerosic Acid." Organic Letters 18, no. 1 (2015): 132–35. http://dx.doi.org/10.1021/acs.orglett.5b03422.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Wang, Xue-Mei, Yi-Wen Liu, Rui-Jun Ma, Chang-Mei Si, and Bang-Guo Wei. "Synthesis of 1,4- and 1,5-Amino Alcohols via Nucleophilic Addition of Semicyclic N,O-Acetal with Organozinc Reagents." Journal of Organic Chemistry 84, no. 17 (2019): 11261–67. http://dx.doi.org/10.1021/acs.joc.9b01545.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Kim, Haejin, Wontaeck Lim, Donghong Im, Dong-gil Kim, and Young Ho Rhee. "Synthetic Strategy for Cyclic Amines: A Stereodefined Cyclic N,O-Acetal as a Stereocontrol and Diversity-Generating Element." Angewandte Chemie International Edition 51, no. 48 (2012): 12055–58. http://dx.doi.org/10.1002/anie.201206967.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Kim, Haejin, Wontaeck Lim, Donghong Im, Dong-gil Kim, and Young Ho Rhee. "Synthetic Strategy for Cyclic Amines: A Stereodefined Cyclic N,O-Acetal as a Stereocontrol and Diversity-Generating Element." Angewandte Chemie 124, no. 48 (2012): 12221–24. http://dx.doi.org/10.1002/ange.201206967.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Gao, Weiwei, Xiaodong Wang, Linbin Yao, et al. "Synthesis of an isomer of lycoplanine A via cascade cyclization to construct the spiro-N,O-acetal moiety." Organic & Biomolecular Chemistry 19, no. 8 (2021): 1748–51. http://dx.doi.org/10.1039/d0ob02399j.

Full text

Abstract:

A 6/10/5/5 tetracyclic isomer of lycoplanine A is synthesized using D–A reaction and cascade cyclization to respectively establish the [9.2.2] pentadecane skeleton and spirocenter, providing sufficient experience to synthesize lycoplanine A.

APA, Harvard, Vancouver, ISO, and other styles

47

Kliegel, Wolfgang, Jörg Metge, Steven J. Rettig, and James Trotter. "Novel boron chelate complexes from the reaction of salicylaldehydes, tertiary amines, and diphenylborinic or phenylboronic acid. Crystal and molecular structures of two new types of chelated organoborate salts." Canadian Journal of Chemistry 75, no. 9 (1997): 1203–14. http://dx.doi.org/10.1139/v97-145.

Full text

Abstract:

The one-pot reaction of equimolar amounts of salicylaldehyde, diphenylborinic acid anhydride, and a tertiary amine in the presence of an alkanol (R′OH) led to the addition of R′OH to the aldehyde group and the formation of an O,O-acetal moiety within the chelate anion with the charge balanced by an ammonium cation arising from the tertiary amine. Exchanging the diphenylborinic acid in the three-component reaction system for phenylboronic acid did not give the analogous adduct or chelate but one additional mole equivalent of phenylboronic acid (anhydride) was incorporated, leading to a polycycl

APA, Harvard, Vancouver, ISO, and other styles

48

Schaefer, W. P., V. Subramanian, and A. G. Myers. "Structure of an 11-membered cyclic silyl enol ether from condensation of methacrolein and a pseudoephedrine-derived O-silyl ketene N,O-acetal." Acta Crystallographica Section C Crystal Structure Communications 48, no. 11 (1992): 2090–92. http://dx.doi.org/10.1107/s0108270192006851.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Hanaya, Tadashi, Kiyoshi Torigoe, Kazuyuki Soranaka, Horoshi Yamamoto, Yao Qizhengt, and Wolfgang Pfleiderer. "Pteridines CV." Pteridines 6, no. 1 (1995): 1–7. http://dx.doi.org/10.1515/pteridines.1995.6.1.1.

Full text

Abstract:

Summary Treatment of L-biopterin (I) with N,N-dimethyformamide dimethyl- (or diethyl)acetal and then with acetic anhydride in pyridine gave 1',2'-di-O-acetyl-N'-(N,N-dimethylaminomethylene)-L-biopterin (4), which was converted by the Mitsunobu reaction into 3-methyl (5) and 3-p-nitrophenetyl derivatives (7). The protective groups on the side chain diols and N2 of these compounds were selectively cleaved to furnish products 6, 8-10, among which 9 is naturally occurring 3-methyl-L-biopterin and 8 is N',N(3)-protected biopterin, a versatile intermediate for various reactions on the side-chain dio

APA, Harvard, Vancouver, ISO, and other styles

50

Sekiya, Shinji, Mao Okumura, Kei Kubota, Tatsuya Nakamura, Daisuke Sekine, and Seijiro Hosokawa. "Remote Asymmetric Bromination Reaction with Vinylketene Silyl N,O-Acetal and Its Application to Total Synthesis of Pellasoren A." Organic Letters 19, no. 9 (2017): 2394–97. http://dx.doi.org/10.1021/acs.orglett.7b00920.

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!