Synthesis and Reactivity of 1-Pyrroline-5-carboxylate Ester 1-Oxides
摘要:
Some C5 mono- and diester-substituted 1-pyrroline-1-oxides have been prepared via reductive cyclisation of the corresponding gamma-nitro carbonyl compounds. Ethyl 2-phenyl-1-pyrroline-1-oxide-5-carboxylate 5c was regioselectively alkylated at C5. Acylation of this molecule occurs exclusively on the nitrone oxygen and leads to C3 substituted pyrrolines as the result of a hetero-Cope rearrangement. (C) 2000 Elsevier Science Ltd. All rights reserved.
Pyrrolidine and thiazolidine derivatives, their preparation and
申请人:Rhone-Poulenc Rorer S.A.
公开号:US05610144A1
公开(公告)日:1997-03-11
This invention relates to compositions of formula: ##STR1## and their salts, their preparation and the medicaments containing them.
这项发明涉及以下结构的化合物:##STR1##及其盐,它们的制备以及含有它们的药物。
Synthesis and Reactivity of 1-Pyrroline-5-carboxylate Ester 1-Oxides
作者:David StC. Black、Gavin L. Edwards、Richard H. Evans、Paul A. Keller、Sean M. Laaman
DOI:10.1016/s0040-4020(00)00094-6
日期:2000.3
Some C5 mono- and diester-substituted 1-pyrroline-1-oxides have been prepared via reductive cyclisation of the corresponding gamma-nitro carbonyl compounds. Ethyl 2-phenyl-1-pyrroline-1-oxide-5-carboxylate 5c was regioselectively alkylated at C5. Acylation of this molecule occurs exclusively on the nitrone oxygen and leads to C3 substituted pyrrolines as the result of a hetero-Cope rearrangement. (C) 2000 Elsevier Science Ltd. All rights reserved.
Convenient synthesis of C-aza-2,3-dideoxynucleosides
作者:Atsuya Momotake、Hideo Togo、Masataka Yokoyama
DOI:10.1039/a900689c
日期:——
1-Aryl-1,2,3,4-tetradeoxy-1,4-imino-D-pentitols 5 and 9f are easily synthesized from N-Boc-L-pyroglutamate 1 via a successive procedure involving regioselective ring-opening, recyclization with dehydration, stereoselective reduction, and reduction of the ester group. Their structures are determined mainly by X-ray crystallography and NMR measurements. Their bioassay is also described.