Stereoselective Synthesis of Alkyl α-(1,3-Alkadien-2-yl)acetates and -propionates by Allene Claisen Rearrangement
作者:Ulrike Behrens、Christian Wolff、Dieter Hoppe
DOI:10.1055/s-1991-26534
日期:——
Configurationally homogeneous (4-hydroxy-1,2-alkadienyl) N,N-diisopropylcarbamates react with trialkyl orthocarboxylates to afford the title compounds stereoselectively. Stereochemical assignment of the highly substituted 1,3-alkadienes is accomplished NMR-spectroscopically by means of couplings constants 3 J(13C-1H) or 3 J (29Si-1H).
配置均匀的(4-羟基-1,2-烷二烯基)N,N-二异丙基氨基甲酸酯与三烷基原羧酸酯发生反应,立体选择性地生成了标题化合物。通过耦合常数 3 J(13C-1H)或 3 J(29Si-1H),可以在核磁共振光谱学上对高度取代的 1,3-烷二烯进行立体化学鉴定。