Oxoketene dithioacetals as versatile synthons for alternative 1,3 to 1,11 carbonyl transpositions: A new polyene synthesis
作者:Malapaka Chandrasekharam、Chitoorthekkathil V Asokan、Hiriyakksnavar Ila、Hiriyakkanavar Junjappa
DOI:10.1016/s0040-4039(00)88875-9
日期:1990.1
strategy for 1,7 to 1,I1 carbonyI transpositions involving 1,2 addition of sodium borohydride or Grignard reagents to polyenyl oxoketene dithioacetals obtained by condensation of bis(methylthio)polyenals 1- with active methylene ketones, followed by borontrifluoride etherate catalyzed methanolysis of the resulting polyenyl carbinol acetals to give 1,n transposed polyene esters has been described.
1,7到1,I1羰基I换位的模型策略,涉及将1,2,H硼氢化钠或Grignard试剂加到通过将双(甲硫基)聚烯醛1-与活性亚甲基酮缩合而得到的多烯基氧杂环丁烷二硫代乙缩醛中,然后通过三氟化硼醚醚催化的甲醇分解反应已经描述了将所得的多烯基甲醇缩醛制得1,n转座的多烯酯。