1,3-Dipolar cycloaddition of azomethine ylides generated from aziridines in supercritical carbon dioxide
作者:Paulo J.S. Gomes、Cláudio M. Nunes、Alberto A.C.C. Pais、Teresa M.V.D. Pinho e Melo、Luis G. Arnaut
DOI:10.1016/j.tetlet.2006.05.179
日期:2006.7
The 1,3-dipolar cycloaddition of azomethineylides with DMAD in supercritical carbon dioxide is reported. The photolysis reaction conditions were optimized with a suitable adjustment of pressure, temperature, irradiation time and co-solvent concentration leading to a more efficient reaction than in neat acetonitrile. Similar results were observed using thermal reaction conditions. Supercritical carbon
AZIRIDINE ALDEHYDES, AZIRIDINE-CONJUGATED AMINO DERIVATIVES, AZIRIDINE-CONJUGATED BIOMOLECULES AND PROCESSES FOR THEIR PREPARATION
申请人:Yudin Andrei K.
公开号:US20100317832A1
公开(公告)日:2010-12-16
The present invention applications for same. More particularly, the present invention relates to novel aziridine aldehydes and processes for preparing these novel compounds. The invention also relates to aziridine-conjugated amino derivatives, and processes for preparing the same. Pentacyclic compounds may be prepared using the aziridine aldehydes of the present invention, and the invention relates to these compounds and the processes by which they are made. The invention also relates to aziridine-conjugated bioactive molecules, such as amino acids and peptides, and processes for preparing such compounds.
Reactivity of 2-halo-2H-azirines. Part 3: Dehalogenation of 2-halo-2H-azirine-2-carboxylates
作者:Teresa M.V.D Pinho e Melo、Ana L Cardoso、António M.d'A Rocha Gonsalves
DOI:10.1016/s0040-4020(03)00248-5
日期:2003.3
The dehalogenation of 2-halo-3-phenyl-2H-azirine-2-carboxylates is described. Using sodium borohydride and tributyltin hydride 3-phenyl-2H-azirine-2-carboxylates were obtained in moderate yields. The synthesis of a new 2-bromo-2H-azirines with a chiral auxiliary, 10-phenylsulfonylisobornyl 2-bromo-3-phenyl-2H-azirine-2-carboxylate, is reported. Its dehalogenation led to 10-phenylsulfonylisobomyl 2H-azirine-2-carboxylate as single stereoisomer together with the formation of 10-phenylsulfonylisobomyl acetate. (C) 2003 Elsevier Science Ltd. All rights reserved.