Synthesis, Decarboxylation, and Nitrosation of 1-Acyl-2-pyrrolidone-3-carboxylic Acids: A Convenient Novel Entry to 2,3-Dioxopyrrolidine Derivatives
作者:Viktoras Gailius、Helmut Stamm
DOI:10.1002/ardp.19923250207
日期:——
Esters 1 of 1‐acyl‐2‐pyrrolidone‐3‐carboxylic acids 2 were hydrolized to 2 with acetic acid/HCl at 60–70°C. Reaction of 1a with formic acid/HCl at 60–75°C led to (not isolated) 2a which began to decarboxylate to 3a during the conversion of 1a to 2a even at this low temp. Decarboxylation of 2c‐f was accomplished at 160°C without solvent. Decarboxylative nitrosation of 2c‐f yielded the oximes 4c‐f of 1‐acyl‐2