Results 201 to 210 of about 25,436 (256)

Direct N-H/α,α,β,β-C(sp3)-H functionalization of piperidine via an azomethine ylide route: synthesis of spirooxindoles bearing 3-substituted oxindoles.

Chemical Communications, 2017
A protocol for the direct functionalization of N-H/α,α,β,β-C(sp3)-H of piperidine without any metal or external oxidants is reported. This reaction is promoted by 4-(trifluoromethyl)benzoic acid via an azomethine ylide intermediate.
Yanlong Du, Aimin Yu, Jiru Jia, You-Cai Zhang, Xiangtai Meng   +4 more
semanticscholar   +1 more source

Azomethine, Carbonyl and Thiocarbonyl Ylides: Generation of Azomethine Ylides from Carbenes and Carbenoids

ChemInform, 2004
AbstractFor Abstract see ChemInform Abstract in Full Text.
openaire   +2 more sources

The azomethine ylide strategy for β-lactam synthesis. An evaluation of alternative pathways for azomethine ylide generation

Journal of the Chemical Society, Perkin Transactions 1, 2001
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Brown, D, Martel, SR, Wisedale, R, Charmant, JPH, Hales, NJ, Fishwick, CWG, Gallagher, TC   +6 more
openaire   +4 more sources

Reaction of Functionalized Azomethine Ylides with Olefinic Dipolarophiles

HETEROCYCLES, 2006
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Keisuke Kawashima, Michihiko Noguchi, Akikazu Kahehi   +2 more
openaire   +3 more sources

ChemInform Abstract: Synthesis of Spiropyrrolidines and Spiropyrrolizidines from Azomethine Ylides. [PDF]

ChemInform, 2014
AbstractAsymmetric cross‐conjugated unsaturated ketones (VII) are used as dipolarophiles in 1,3‐dipolar cycloaddition reactions for the first time.
I. N. Klochkova, M. P. Shchekina, A. A. Aniskov   +2 more
openaire   +2 more sources

Enantioselective Cycloadditions of Azomethine Ylides

2008
The asymmetric 1,3-DCR of azomethine ylides, which is generated from the corresponding imino ester and alkenes, is one of the most fascinating transformations because the configuration of the four new stereogenic centers of the finally obtained proline can be absolutely established in only one step with total atom economy.
José M. Sansano, Carmen Nájera
openaire   +2 more sources

ChemInform Abstract: N‐Metalated Azomethine Ylides

ChemInform, 1993
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Shuji Kanemasa, Otohiko Tsuge
openaire   +2 more sources

Sterically controlled azomethine ylide cycloaddition polymerization of phenyl-C61-butyric acid methyl ester.

Chemical Communications, 2016
Phenyl-C61-butyric acid methyl ester (PCBM) is polymerized simply using a one-pot reaction to yield soluble, high molecular weight polymers. The sterically controlled azomethine ylide cycloaddition polymerization (SACAP) is demonstrated to be highly ...
M. Stephen, Hasina H Ramanitra, H. Santos Silva, Simon A Dowland, D. Bégué, K. Genevičius, K. Arlauskas, G. Juška, Graham Morse, A. Distler, R. Hiorns   +10 more
semanticscholar   +1 more source

The continuous-flow cycloaddition of azomethine ylides to carbon nanotubes

Chemical Communications, 2011
This communication demonstrates a straightforward continuous-flow method for efficient exohedral functionalisation of carbon nanotubes which affords soluble samples in a much shorter time over conventional batch processing.
SALICE P, MAITY, PRASENJIT, ROSSI E, CAROFIGLIO, TOMMASO, MENNA, ENZO, MAGGINI, MICHELE   +5 more
openaire   +6 more sources

Enantioselective Copper‐Catalyzed [3+3] Cycloaddition of Azomethine Ylides with Azomethine Imines

Angewandte Chemie, 2013
Enantioselective copper-catalyzed [3+3] cycloaddition of azomethine ylides with azomethine ...
Hongchao Guo, Xiang-Ping Hu, Min Wang, Risong Na, Hao Yu, Zhen Li, Fu-Lin Zhu, Honglei Liu, Yumei Xiao, Yang Wu, Bo Wang, Lei Zhang, Hui Jiang   +12 more
openaire   +3 more sources