Sakurai Reaction of 3,3-Bis(silyl) Silyl Enol Ethers with Acetals Involving Selective Desilylation of the Geminal Bis(silane). Concise Synthesis of Nematocidal Oxylipid
作者:Linjie Li、Xincui Ye、Ya Wu、Lu Gao、Zhenlei Song、Zhiping Yin、Yongjin Xu
DOI:10.1021/ol400069p
日期:2013.3.1
3,3-Bis(silyl) silyl enol ethers have been shown to exhibit predominantly Sakurai reactivity, rather than Mukaiyama aldol reactivity, in their Lewis acid promoted reactions with acetals. Starting from a geminal bis(silyl) moiety consisting of two different silyl groups, such as SiMe3 and SiMe2Ph, the SiMe3 is selectively eliminated to give monoprotected E- vinylsilyl diols with good to excellent s
3,3-双(甲硅烷基)甲硅烷基烯醇醚在其路易斯酸促进的与缩醛的反应中已显示出主要表现出樱井反应性,而不是Mukaiyama羟醛反应性。从由两个不同甲硅烷基组成的偕双(甲硅烷基)部分开始,例如SiMe 3和SiMe 2 Ph,SiMe 3被选择性消除,得到单保护的E-乙烯基甲硅烷基二醇,其具有良好至优异的顺式非对映选择性。该反应还支持了从Notheia anomala中合成杀线虫氧脂,证明了偕双(硅烷)的有吸引力的双功能性。