Enantioselective syntheses of all four stereoisomers of formoterol are accomplished using asymmetric catalytic borane reductions with chiral oxazaborolidines as reducing agents.
Enantio- and diastereoselective synthesis of all four possible stereoisomers of 2-(phenylhydroxymethyl)quinuclidine
β Scribed by Barry Lygo; John Crosby; Terence R. Lowdon; Philip G. Wainwright
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- French
- Weight
- 316 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0040-4039
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β¦ Synopsis
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.
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