A Novel Catalytic System for the Mannich-Type Reaction of Silyl Enolates: Stereoselective Synthesis of beta-Aminoketones Studies on Organosilicon Chemistry, Part 148. This work was partly supported by Grants-in-Aid for Scientific Research, Grants-in-Aid for Scientific Research on Priority Areas No. 706 (Dynamic Control of Stereochemistry) from the Ministry of Education, Science, Sports, and Culture, Japan, by Hitachi Chemical Industries, Inc., and by Pfizer Pharmaceuticals, Inc. Part 147: H. Ito