名称:
1,4-Bis(arylsulfonyl)dihydropyridines in synthesis. Enantioselective synthesis of 2,3,6-trisubstituted piperidines
摘要:
A 2-substituted 1,4-bis (4-tolylsulfonyl)-1,2-dihydropyridine is readily accessed from an alpha -aminoester and 1,1-dimethoxy-3-(4-tolylsulfonyl)propane. This cyclic diene enters into highly selective addition reactions with carbon nucleophiles, and the product of one of these transformations is converted into a 2,3,6-trisubstituted piperidine via an S(N)1 ' reaction. (C) 2001 Elsevier Science B.V. All rights reserved.