Reactions of Grignard reagents from 1-halogenoallenes. Allenes—XXXIII
作者:P.M. Greaves、S.R. Landor、M.M. Lwanga
DOI:10.1016/0040-4020(75)80150-5
日期:1975.1
Grignardreagents have been prepared from 1-bromo-3,3-dialkylallenes in ether or tetrahydrofuran. The allenic acids, 4,4-dialkylbuta-2,3-dienoic acids together with 4,4-dialkylbut-2-ynoic acids are formed with carbon dioxide to the exclusion of acids with a terminal acetylene group. Two coupled products, 3,4-diethyl-3,4-dimethylhexa-1,5-diyne and 3-ethyl-3,6-dimethylocta-4,5-dien-1-yne, which are formed