Catalytic Asymmetric 1,3-Dipolar Cycloaddition of α-Iminonitriles
作者:Rocío Robles-Machín、Inés Alonso、Javier Adrio、Juan C. Carretero
DOI:10.1002/chem.200903443
日期:2010.5.10
Improving the structural scope: A catalytic asymmetric1,3‐dipolarcycloaddition involving α‐iminonitriles as azomethine precursors has been developed. In the presence of AgOAc/Taniaphos as the catalyst system the reaction of α‐iminonitriles with dimethyl fumarate and N‐methyl maleimide affords 2‐cyanopyrrolidines with good endo selectivity and enantioselectivity (68–≥99 % ee; see scheme).