Chemoenzymatic synthesis of enantiopure isopropyl (3R)- and (3S)-3-hydroxycyclohex-1-ene-1-carboxylates and their reduction to isomers of isopropyl 3-hydroxy-cyclohexane-1-carboxylate
摘要:
Reduction of an alpha,beta-unsaturated cyclic ketone with Geotrichum candidum affords the corresponding (S)-allylic alcohol, while enantiospecific oxidation of the corresponding racemic alcohols leases the (R)-enantiomer unchanged, giving access to both enantiomeric forms. Subsequent chemical reduction of the double bond of these homochiral allylic alcohol allows all isomers of the corresponding cyclohexanols to be obtained. (C) 2002 Elsevier Science Ltd. All rights reserved.
Chemoenzymatic synthesis of enantiopure isopropyl (3R)- and (3S)-3-hydroxycyclohex-1-ene-1-carboxylates and their reduction to isomers of isopropyl 3-hydroxy-cyclohexane-1-carboxylate
摘要:
Reduction of an alpha,beta-unsaturated cyclic ketone with Geotrichum candidum affords the corresponding (S)-allylic alcohol, while enantiospecific oxidation of the corresponding racemic alcohols leases the (R)-enantiomer unchanged, giving access to both enantiomeric forms. Subsequent chemical reduction of the double bond of these homochiral allylic alcohol allows all isomers of the corresponding cyclohexanols to be obtained. (C) 2002 Elsevier Science Ltd. All rights reserved.
Chemoenzymatic synthesis of conformationally rigid glutamic acid analogues
作者:F. Trigalo、D. Buisson、R. Azerad
DOI:10.1016/s0040-4039(00)82278-9
日期:——
All stereomers of cyclohexane and cyclopentane-derived analogues of glutamic acid have been synthesized from the corresponding 3-keto-cycloalkyl carboxylic acid esters by a combination of microbial steps and standard chemical methods.