Synthesis of Reactive Intermediates for Natural Cyclopentane Derivatives from (−)-Quinic Acid: Preparation of 11α-hydroxy-13-oxaprostanoic acid
作者:Jean-Claude Barrière、Angèle Chiaroni、Jeanine Cléophax、Stephan D. Géro、Claude Riche、Mare Vuilhorgne
DOI:10.1002/hlca.19810640419
日期:1981.6.10
We describe a flexible, stereocontrolled synthesis of enantiomerically pure substituted cyclopentenes and cyclopentanes - including 11α-hydroxy-13-oxaprostanoic acid 20 - (−)-quinic acid via an acyclic precursor 6 by an intramolecular aldolisation-dehydration reaction.
Synthèse de composés cyclopentaniques chiraux, di, tri et tétrasubstitués. Application à la synthèse de dérivés Oxa-13-prostanoïques
作者:Jean-Claude Barrière、Jeanine Cléophax、Stephan D. Géro、Marc Vuilhorgne
DOI:10.1002/hlca.19830660508
日期:1983.7.27
The cyclopentenecarbaldehyde 1a, acetals 2a, 2b and the cyclopentenone 2c have been transformed through regio and stereocontrolled reactions into a variety of enantiomerically pure substituted cyclopentanes. Using appropriately selected Wittig reagents, aldehyde 1a furnished the condensation products 3, 4, 5. Michael addition of diethyl malonate on the α,β-unsaturated aldehyde 1a under phasetransfer
作者:GERO, S.、CLEOPHAX, J.、BARRIERE, J. -C.、CIER, A.
DOI:——
日期:——
Synthesis of Enantiomerically Pure Substituted Cyclopentenes from (−)-Quinic Acid
作者:Jean-Claude Barrière、Jeanine Cléophax、Stephan D. Géro、Marc Vuilhorgne
DOI:10.1002/hlca.19830660127
日期:1983.2.2
The synthesis of a large variety of enantiomericallypuresubstituted reactive cyclopentenes 16, 23, 24 and 28 have been synthesized from the readily available (−)-quinic acid 1. The straightforward strategy involves a high-yielding intramolecular aldolization-dehydration of acyclic 1,6-dialdehydes 13, 18, 19 and 27 obtained by oxidative cleavage of cyclohexanediols 5, 7, 11 and 12, using either lead