BOZHKOVA, NINA;HEIMGARINER, HEINZ, HELV. CHIM. ACTA, 72,(1989) N, C. 825-837
作者:BOZHKOVA, NINA、HEIMGARINER, HEINZ
DOI:——
日期:——
Synthesis of 4-Alkoxy-1,3-oxazol-5(2H)-ones, Precursors of 1-alkoxy substituted nitrile ylides
作者:Nina Bozhkova、Heinz Heimgartner
DOI:10.1002/hlca.19890720424
日期:1989.6.14
of an alcohol gave the corresponding 4-alkoxy derivatives 4, presumably via nucleophilic substitution of an intermediate sulfoxide (Scheme 2). The second approach is the BF3-catalyzed condensation of imino-acetates of type 6 and ketones (Scheme 3). The yields of this more straightforward method were modest due to the competitive formation of 1,3,5-triazine tricarboxylate 8. At 155°, 1,3-oxazol-5(2H)-one