Reaction of 1,3-dilithioacetylides with carbonyl electrophiles: preparation of allene-1,3-dicarboxylic acids
Abstract
1,3-Dilithioalk-1-ynes react with carbon dioxide and give alk-2,3-dien-1,5-dioic acids; in contrast the acetylenes, alk-2-yn-1,5-diols are isolated on reaction with aldehydes and ketones.