Copper-Mediated S<sub>N</sub>2′ Allyl–Alkyl and Allyl–Boryl Couplings of Vinyl Cyclic Carbonates
作者:Núria Miralles、José Enrique Gómez、Arjan W. Kleij、Elena Fernández
DOI:10.1021/acs.orglett.7b02947
日期:2017.11.17
for the copper-catalyzed borylmethylation and borylation of vinyl cyclic carbonates through an SN2′ mechanism is reported. These singular reactions involve selective SN2′ allylic substitutions with concomitant ring opening of the cyclic carbonate and with extrusion of CO2 and formation of a useful hydroxyl functionality in a single step. The stereoselectivity of the homoallylic borylation and allylic
报道了一种通过S N 2'机理进行铜催化的乙烯基环状碳酸酯的硼烷基甲基化和硼化的方法。这些奇异反应包括选择性的S N 2'烯丙基取代,伴随有环状碳酸酯的开环,以及CO 2的挤出和在单个步骤中形成有用的羟基官能团。可以控制均烯丙基硼化和烯丙基硼化过程的立体选择性,并且合成上有用的不饱和(E)-戊-2-烯-1,5-二醇和(E)-丁-2-烯-1,4-二醇是访问。