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.
1,3-Dilithioalk-1-ynes与
二氧化碳反应生成alk-2,3-dien-1,5-dioic酸;相反,在与醛和酮反应时分离出
乙炔,alk-2-yn-1,5
-二醇。