Synthesis of Divinyl-1-oxaspiro[m.4]alkanes and Divinyl-1-oxaspiro[m.4]alkan-2-ols from 1,8-Bis(trimethylsilyl)-2,6-octadiene and Acyl Chlorides
作者:Arlette Tubul、Philippe Ouvrard、Maurice Santelli
DOI:10.1055/s-1991-26410
日期:——
Titanium(IV) chloride mediated condensation of 1,8-bis(trimethylsilyl)-2,6-octadiene with α, β, γ or δ-haloacyl chlorides leads to the potentially useful intermediates (d,l)-1-haloalkyl-2,5-divinylcyclopentanols. The latter, under basic treatment, afford divinyl-1-oxaspiro[m.4]alkanes (m = 2-5). Dialkylation of methyl (chloroformyl) alkanoates followed by reduction provides divinyl-1-oxaspiro[m.4]alkan-2-ols (m = 4 and 5).
四氯化钛介导的1,8-双(三甲基硅基)-2,6-辛二烯与α,β,γ或δ-卤代乙酰氯的缩合反应,产生潜在有用的中间体(d,l)-1-卤代烷基-2,5-二乙烯基环戊醇。后者在碱性处理下,得到二乙烯基-1-氧杂螺[m.4]烷(m=2-5)。甲基(氯甲酰基)烷酸酯的双烷基化反应后进行还原,提供二乙烯基-1-氧杂螺[m.4]烷-2-醇(m=4和5)。