A Versatile Synthesis of 3-Phenylsulfonylpyrroles from α-Amino Acids
作者:Ian Burley、Alan T. Hewson
DOI:10.1055/s-1995-4068
日期:1995.9
Reaction between α-benzamidoalkyl ketones 4a-e and the vinyl phosphonium salt 1 produces 3-phenylthio-3-pyrrolines 5a-e which can be converted into N-benzyl-3-phenylsulfonyl pyrroles 7a-e by m-CPBA oxidation, diborane reduction and DDQ aromatisation.
Synthesis of a highly functionalised bicyclo[3.3.0]octane
作者:Alan T. Hewson、David T. MacPherson
DOI:10.1016/s0040-4039(00)94207-2
日期:1983.1
The bicyclo[3.3.0]octanes 4 and 5 are prepared by making use of vinyl phosphonium salts, and 4 is used in formal total syntheses of chrysomelidial and loganin.
Synthesis of the necine base (−)-supinidine from (S )-glutamic acid
作者:Carole M. Boynton、Alan T. Hewson、Douglas Mitchell
DOI:10.1039/b005516f
日期:——
5-acetylpyrrolidin-2-one using an intramolecular Wittig reaction with vinylphosphonium salts. The acetoxy ketone 15, derived from (S)-N-benzyloxycarbonylpyroglutamic acid, affords 16, a known precursor of (−)-supinidine.
A versatile approach to 3-alkyl and 2,3-dialkylpyrroles
作者:Ian Burley、Biljana Bilic、Alan T Hewson、Jillian R.A Newton
DOI:10.1016/s0040-4039(00)01591-4
日期:2000.11
A route is described towards N-benzoyl-3-alkyl and N-benzoyl-2,3-dialkyl pyrroles from alpha -amido-ketones via an intramolecular Wittig reaction to afford 4-phenylthio-3-pyrrolines which are then oxidised to the corresponding sulphones and aromatised by treatment with potassium t-butoxide. (C) 2000 Elsevier Science Ltd. All rights reserved.
Cameron, Andrew G.; Hewson, Alan T.; Wadsworth, Alan H., Journal of the Chemical Society. Perkin transactions I, 1984, p. 2337 - 2344
作者:Cameron, Andrew G.、Hewson, Alan T.、Wadsworth, Alan H.