Catalytic Enantioselective Desymmetrization of Norbornenoquinones via C(sp<sup>2</sup>)–H Alkylation
作者:Rahul Sarkar、Santanu Mukherjee
DOI:10.1021/acs.orglett.6b03168
日期:2016.12.2
The enantioselective Diels–Alder (DA) reaction with monosubstituted p-benzoquinones is an unmet challenge. A new approach for the enantioselective synthesis of monosubstituted quinone-DA adducts is presented based on C(sp2)–H alkylative desymmetrization of meso-DA adducts. Catalyzed by a tertiary amino-thiourea derivative, this reaction utilizes nitroalkanes as the alkylating agents and generates densely
与单取代对苯醌的对映选择性Diels–Alder(DA)反应是一个尚未解决的挑战。基于内消旋-DA加合物的C(sp 2)-H烷基化脱对称,提出了一种单取代的醌-DA加合物的对映选择性合成的新方法。在叔氨基-硫脲衍生物的催化下,该反应利用硝基烷烃作为烷基化剂,并产生稠密的官能化产物,该产物带有至少四个连续的立体异构中心,远离反应部位,具有出色的对映选择性。