Allenes. Part XXVIII. Synthesis of antibiotic lactols and an allenic ester by Claisen rearrangement of prop-2-ynyl vinyl ethers
作者:Donald K. Black、Zacharias T. Fomum、Phyllis D. Landor、Stephen R. Landor
DOI:10.1039/p19730001349
日期:——
Naturally occurring 4-hydroxy-2-vinylbut-2-en-4-olide (V), an allenic analogue [4-hydroxy-3,3-dimethyl-2-vinylidenebutan-4-olide (VII)], and the corresponding aldehyde ester [ethyl 2-(1-formyl-1-methylethyl)buta-2,3-dienoate (VIII)] have been synthesised by a Claisen-type sigmatropic rearrangement of 3-carboxyprop-2-ynyl vinyl ethers.
天然存在的4-羟基-2-乙烯基丁-2-烯-4-醇(V),烯丙基类似物[4-羟基-3,3-二甲基-2-亚乙烯基丁烷-4-醇(VII)]和相应的通过3-羧基丙-2-炔基乙烯基醚的克莱森型σ重排,合成了乙醛酯[2-(1-甲酰基-1-甲基乙基)丁醛-2,3-二烯酸酯(VIII)]。