Direct Access to β-Trifluoromethyl-β-hydroxy Thioesters by Biomimetic Organocatalytic Enantioselective Aldol Reaction
作者:Jin Hyun Park、Jae Hun Sim、Choong Eui Song
DOI:10.1021/acs.orglett.9b01469
日期:2019.6.21
decarboxylative catalytic aldol reaction of trifluoromethyl ketones with malonic acid half-thioesters (MAHTs) is described. Utilizing cinchona-based thioureas as highly efficient polyketide synthase-mimic catalysts, chiral tertiary aldols, β-trifluoromethyl-β-hydroxy thioesters, were obtained in up to 99% yield and 95% ee. Facile transformation of the thioester moiety of the aldol adducts showcases the synthetic
描述了三氟甲基酮与丙二酸半硫酯(MAHT)的广泛适用的仿生对映选择性脱羧催化羟醛反应。利用基于金鸡纳酮的硫脲作为高效的聚酮化合物合酶模拟催化剂,可以以高达99%的收率和95%ee的产率获得手性叔醇,β-三氟甲基-β-羟基硫酯。醛醇加合物的硫酯部分的容易转化证明了该仿生醛醇规程的合成效用,以提供一系列手性三氟甲基化叔醇醛药效团。