Synthesis of Thioethers by InI3-Catalyzed Substitution of Siloxy Group Using Thiosilanes
作者:Yoshihiro Nishimoto、Aya Okita、Akio Baba、Makoto Yasuda
DOI:10.3390/molecules21101330
日期:——
OSitBuMe₂ and OSiiPr₃ groups, other than the OSiMe₃ group, were successfully substituted. The substitution reaction of enantiopure secondary benzylic silyl ether yielded the corresponding racemic thioether product, which suggested that the reaction of tertiary alkyl, secondary alkyl, benzylic, and propargylic silyl ethers would proceed via a SN1 mechanism.
在InI 3催化剂存在下,用硫代硅烷平稳地进行甲硅烷氧基的取代,得到相应的硫醚。在该反应体系中,InI 3是一种特别有效的催化剂,而其他典型的路易斯酸,如BF 3·OEt 2,AlCl 3和TiCl 4则无效。可使用各种甲硅烷基醚,例如伯烷基,仲烷基,叔烷基,烯丙基,苄基和炔丙基类型。另外,除OSiMe 3基团外,笨重的OSitBuMe 2和OSiiPr 3基团也被成功取代。对映体纯的仲苄基甲硅烷基醚的取代反应产生相应的外消旋硫醚产物,这表明叔烷基,仲烷基,苄基和炔丙基甲硅烷基醚的反应将通过SN1机理进行。