Results 171 to 180 of about 8,159 (220)

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.
S. KANEMASA, O. TSUGE
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Azomethine, Carbonyl and Thiocarbonyl Ylides: Generation of Azomethine Ylides from Carbenes and Carbenoids

ChemInform, 2004
AbstractFor Abstract see ChemInform Abstract in Full Text.
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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, Honglei, Liu, Fu-Lin, Zhu, Risong, Na, Hui, Jiang, Yang, Wu, Lei, Zhang, Zhen, Li, Hao, Yu, Bo, Wang, Yumei, Xiao, Xiang-Ping, Hu, Min, Wang   +12 more
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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.
Carmen Nájera, José M. Sansano
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Microwave-Assisted [3 + 2] Cycloadditions of Azomethine Ylides

Organic Letters, 2003
The microwave-assisted intramolecular [3 + 2] cycloaddition reaction of azomethine ylides to activated and nonactivated alkenes and alkynes is described. The procedure allows the synthesis of pyrrolidines and pyrrole products in good to excellent overall yields in short reaction times.
George, Bashiardes, Imad, Safir, Achmet Said, Mohamed, Francis, Barbot, Joelle, Laduranty   +4 more
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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, Akikazu Kahehi, Michihiko Noguchi   +2 more
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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
Following the generation of azomethine ylide 3 from the β-lactam-based oxazolidinone 1, a series of alternative entries to this and related 1,3-dipoles have been explored. The first approach is based on the use of monocyclic azetidinones 6–12 and 14 carrying a leaving group at C(4) and an activated (acidic) proton adjacent to the ring nitrogen ...
Brown, D, Martel, SR, Wisedale, R, Charmant, JPH, Hales, NJ, Fishwick, CWG, Gallagher, TC   +6 more
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Recent Advances in Azomethine Ylide Chemistry

1989
Publisher Summary Azomethine ylides are planar molecules composed of one nitrogen and two terminal sp2 carbons. At most, four geometrical isomers are possible for these transient molecules. Their cycloadditions to olefin or acetylene dipolarophiles give rise to the formation of two sets of carbon-carbon bonds in a single step.
Otohiko Tsuge, Shuji Kanemasa
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ChemInform Abstract: Benzotriazolylmethylaminosilanes: Novel Azomethine Ylide Equivalents.

ChemInform, 1995
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.
A. R. KATRITZKY, J. KOEDITZ, H. LANG
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1,7-Electrocyclisation of non-stabilised azomethine ylides

Tetrahedron Letters, 1998
Abstract Non-stablilised α,β;γ,δ-unsaturated azomethine ylides 3 were generated by the decarboxylation method from 3,3-diarylpropenals 1 and secondary amino acids 2 . 1,7-Electrocyclisation of these azomethine ylides, followed by a 1,5-hydrogen shift, gives 2,3-dihydro-1 H -2-benzazephines 4 .
Andrea Arany, Paul W. Groundwater, Miklòs Nyerges   +2 more
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