Simple Diamine- and Triamine-Protonic Acid Catalysts for the Enantioselective Michael Addition of Cyclic Ketones to Nitroalkenes
作者:Sunil V. Pansare、Keyur Pandya
DOI:10.1021/ja062701n
日期:2006.8.1
chiral, pyrrolidine-based diamine and triamine derivatives that incorporate the secondary-secondary diamine motif are efficient catalysts for the highly diastereoselective and enantioselectiveMichaeladdition of cyclic ketones to 2-nitrovinyl arenes. The highest selectivities are obtained when these catalysts are used in conjunction with protonic acids. Steric factors in the substrate and the size of