Highly Efficient and Practical Pyrrolidine-Camphor-Derived Organocatalysts for the Direct α-Amination of Aldehydes
作者:Pang-Min Liu、Dhananjay R. Magar、Kwunmin Chen
DOI:10.1002/ejoc.201000695
日期:2010.10
for direct α-amination of aldehydes with dialkyl azodicarboxylates to give the desired α-aminated products in high chemical yields (up to 92 %) and with high to excellent levels of stereoselectivity (up to >99 % ee). The reactions proceeded rapidly (within 5 min) with low catalyst loading (5 mol-%) at ambient temperature. Enantioselective aminations of asymmetric α,α-disubstituted aldehydes in the catalytic