Esters and amides from aziridine 2-carboxylic acid salts
作者:C. Lambert、H.G. Viehe
DOI:10.1016/s0040-4039(00)88924-8
日期:1985.1
Potassium salts of aziridine-2-carboxylic acid derivatives are efficiently converted into esters of amides by reactions with alkyl halides, alkyl dihalides or by acylation with trimethylacetyl chloride followed by aminolyses.
Study of nucleophilic ring opening of various functionalized aziridines (2-alkoxycarbonyl, 2-hydroxymethyl, 2-cyano- and 2-aminomethyl) by alcohols in presence of diethyl ether-boron trifluoride complex.
Preparation of optically active aziridine carboxylates by lipase-catalyzed alcoholysis
作者:Monique Martres、Gérard Gil、Alain Méou
DOI:10.1016/s0040-4039(00)78498-x
日期:1994.11
Aziridine carboxylates alcoholysis by lipases depends of the N-substituent. N-alkyl and N-aryl compounds have been resolved with medium to good enantiomeric purity by enzymatic alcoholysis catalyzed by pig pancreatic (PPL) or Candidacylindracealipase (CCL).
This invention relates to a pharmaceutical comprising as an effective ingredient an arylmethylene urea exemplified by the following formula:
or a pharmaceutically acceptable salt thereof. The arylmethylene urea and the pharmaceutically acceptable salts thereof are useful for therapy or prophylaxis of inflammatory bowel disease and overactive bladder.
Synthesis and reactivity of 4-chloro-3,3,4-trifluoro-methoxycarbonyl cyclobutene (CTMC)
作者:Marie-Aim�e Plancquaert、Zdenek Janousek、Heinz G. Viehe
DOI:10.1002/prac.19943360106
日期:——
An improved synthesis of CTMC is described. This cyclobutene is thermally stable towards electrocyclic ring opening. Its reactivity is explored and a number of radical adducts are described. A more complicated picture is observed with various nucleophiles. The strong dienophilic character of CTMC is illustrated by numerous examples. CTMC reacts well as a dipolarophile with diphenylnitrone, diphenylnitrilimine and diazoalkanes. The high reactivity of this cyclobutene is due to its inherent polarity and strain.