Synthesis of α-alkylated γ-butyrolactones with concomitant anhydride kinetic resolution using a sulfamide-based catalyst
作者:Romain Claveau、Brendan Twamley、Stephen J. Connon
DOI:10.1039/c8ob02248h
日期:——
class of bifunctional sulfamide organocatalyst, a regio-, diastereo- and enantioselective cycloaddition reaction between the enolisable anhydride and benzaldehydes provides densely functionalised γ-butyrolactones in one pot (up to 19 : 1 dr, 94% ee) with control over three contiguous stereocentres. The concomitant resolution of the starting material anhydride, provides access to a range of chiral succinate
首次显示α-烷基化的可烯丙基二取代酸酐的动力学拆分(KR)是可能的。在专门设计的新型双功能磺酰胺有机催化剂的存在下,可烯化酸酐与苯甲醛之间的区域,非对映和对映选择性环加成反应可在一个罐中提供致密官能化的γ-丁内酯(高达19:1 dr,94% ee),并且可以控制三个连续的立体中心。伴随着原料酸酐的分解,可得到一系列选择性比高达S * = 10.5的手性琥珀酸酯衍生物。