Preparation of 3-Oxo- and 3-Ethylideneazetidine Derivatives
作者:Hans Bauman、Rudolf O. Duthaler
DOI:10.1002/hlca.19880710514
日期:1988.8.10
The preparation of 3-azetidinones with different N-substituents and their transformation to 3-ethylideneazetidines has been studied in relation with a projected synthesis of 3-ethylideneazetidine-2-carboxylic acid (= polyoximic acid; 1). The stable crystalline 3-azetidinone hydrochloride (18), obtained by hydrogenolysis of the known 1-(diphenylmethyl)-3-azetidenone (4), is described for the first time