Results 171 to 180 of about 7,765 (231)

Formation of Scalemic Aziridines via the Nucleophilic Opening of Aziridines

The Journal of Organic Chemistry, 1997
Introduction As part of our work in the preparation of aziridineallylsilanes1 we had need of a method for the preparation of simple monosubstituted, scalemic aziridines such as 1. The preparation of scalemic aziridines has been well covered in a number of reviews.2 Two methods seemed particularly well suited for the preparation of the types of ...
Stephen C., Bergmeier, Punit P., Seth
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N‐Arylation of Aziridines.

ChemInform, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
Mikio, Sasaki, Shadi, Dalili, Andrei K, Yudin   +2 more
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Catalyst-free aziridination and unexpected homologation of aziridines from imines

Organic & Biomolecular Chemistry, 2010
Aziridination and unpredicted homologation reaction of N-sulfonylimines were achieved easily with a very simple, rapid and mild procedure through the use of diazomethane without the presence of any catalyst. The method represents an attractive alternative to metal-catalyzed processes.
Paula Sério, Branco, Vivek Prabhakar, Raje, Jorge, Dourado, Joana, Gordo   +3 more
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Organocatalytic Asymmetric Aziridination of Enones

Angewandte Chemie International Edition, 2008
A primary amine derived from cinchona alkaloids as a salt with d-N-Boc phenylglycine (Boc = tert-butoxycarbonyl) is an efficient catalyst for the aziridination of α,β-unsaturated ketones. This method is effective with both linear and cyclic substrates, leading to chiral aziridines in high yield, with complete diastereoselectivity, and with very high ...
PESCIAIOLI, FABIO, DE VINCENTIIS, FRANCESCO, GALZERANO, PATRIZIA, BENCIVENNI, GIORGIO, BARTOLI, GIUSEPPE, MAZZANTI, ANDREA, MELCHIORRE, PAOLO   +6 more
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An Amine‐Promoted Aziridination of Chalcones.

ChemInform, 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.
Yu-Mei, Shen, Mei-Xin, Zhao, Jiaxi, Xu, Yian, Shi   +3 more
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Chemistry of Carbohydrate Aziridines

2006
Publisher Summary This chapter discusses the chemistry of carbohydrate aziridines, with emphasis being placed on surveying preparative methods and ring-opening reactions. Carbohydrate aziridines or epimines are derivatives in which an aziridine ring is fused to a pyranose or furanose ring or to an exocyclic part of a carbohydrate molecule.
Jindrich, Karban, Jirí, Kroutil
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Epoxides and Aziridines

ChemInform, 2005
AbstractFor Abstract see ChemInform Abstract in Full Text.
Albert Padwa, S. Shaun Murphree
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Asymmetric Catalytic Aziridination to Synthesize Spiro‐aziridine Oxindoles

Chemistry – A European Journal
AbstractAsymmetric catalytic aza‐Michael‐initiated ring closure of methyleneindolinones with N‐tosyloxycarbamates has been established. The reaction using a chiral nickel complex catalyst enabled the formation of a series of spiro‐aziridine oxindoles in good yields (up to 99 %) with high stereoselectivity (up to 97 % ee, >19 : 1 dr) under mild ...
Yinhe Qu, Zhenzhong Liu, Yuqiao Zhou, Xiaoming Feng, Xiaohua Liu   +4 more
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Asymmetric Aziridination

ChemInform, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
M. M. Faul, D. A. Evans
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A probable aziridine radical: mechanism of addition of aziridine to styrenes

Journal of the Chemical Society D: Chemical Communications, 1969
Strong evidence of an aziridine radical in the sodium-catalysed addition of aziridine to styrenes has been obtained.
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