The Diels-Alder Reaction with 5,5-Dimethoxy-1,2,3,4-tetrachlorocyclopentadiene<sup>1</sup>
作者:E. T. McBee、W. R. Diveley、J. E. Burch
DOI:10.1021/ja01607a045
日期:1955.1
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