Selective Condensation of [3-(Alkylthio)allyl]titanium Reagent with Carbonyl Compounds
作者:Kyoji Furuta、Yoshihiko Ikeda、Noriyuki Meguriya、Nobuo Ikeda、Hisashi Yamamoto
DOI:10.1246/bcsj.57.2781
日期:1984.10
[3-(Ethylthio)allyl]titanium reagent generated easily from allyl ethyl sulfides condensed with aldehydes to give erythro-β-hydroxy sulfides in highly regio- and stereoselective manner. In contrast, crotyl ethyl sulfide reacted with aldehydes affording δ-hydroxy vinyl sulfide exclusively. The substitution pattern of the starting sulfide can have a pronounced effect on the selectivity in this condensation reaction
[3-(乙硫基)烯丙基]钛试剂很容易从烯丙基乙基硫化物与醛缩合生成赤型-β-羟基硫化物,以高度区域和立体选择性的方式。相比之下,巴豆基乙基硫醚与醛反应仅提供 δ-羟基乙烯基硫醚。起始硫化物的取代模式对该缩合反应的选择性有显着影响。获得的赤型-β-羟基硫化物立体选择性地转化为反式乙烯基环氧乙烷或 1,3-链二烯。