Hydroalumination of phenylthioacetylenes. Synthesis and reactions of ( Z )- and ( E )-1-butyltelluro-1-phenylthio-1-alkenes
作者:Miguel J Dabdoub、Palimécio G Guerrero
DOI:10.1016/s0040-4039(01)01511-8
日期:2001.10
addition of C4H9TeBr afforded (Z)-telluro(thio)ketene acetals (Z >80–93%). The (E)-isomers were obtained with 100% stereoselectivity by reduction of thioacetylenes with DIBAL-H, followed by the addition of n-BuLi and subsequent treatment with C4H9TeBr. Reaction of the (E)-telluro(thio)ketene acetals with n-BuLi followed by the addition of valeraldehyde afforded the (Z)-phenylthio allylic alcohol as
用Zweifel试剂作为还原剂对苯硫基乙炔进行氢铝化,然后添加C 4 H 9 TeBr,得到(Z)-碲(硫代)乙烯酮缩醛(Z > 80-93%)。通过用DIBAL-H还原硫代乙炔,然后加入正丁基锂并随后用C 4 H 9 TeBr处理,以100%的立体选择性获得(E)-异构体。(E)-碲(硫代)乙烯酮缩醛与正丁基锂反应,然后加入戊醛,得到(Z)-苯硫基烯丙醇为主要产物,并痕量(E)异构体,而(Z)-和(E)-碲(硫代)乙烯酮缩醛的混合物在相似的反应条件下仅得到(E)-苯硫基烯丙基醇。