Enantio- and diastereoselective synthesis of all four possible stereoisomers of 2-(phenylhydroxymethyl)quinuclidine
摘要:
An enantio- and diastereoselective synthesis of all four possible stereoisomers of 2-(phenylhydroxymethyl)quinuclidine is reported. Key steps involve the use of the Sharpless dihydroxylation protocol to induce asymmetry, and stereodivergent cyclisations of the resulting diol to form the quinuclidine ring. (C) 1997 Elsevier Science Ltd.
Asymmetric approaches to 2-hydroxymethylquinuclidine derivatives
摘要:
Highly enantio- and diastereoselective routes to 2-hydroxymethylquinuclidines have been developed. Key steps involve the use of Sharpless dihydroxylation or Sharpless epoxidation to introduce the asymmetry with high stereocontrol, and formation of the quinuclidine ring systems via cyclisation of epoxy amines. (C) 1999 Elsevier Science Ltd. All rights reserved.