Novel preparation of (−)-4-hydroxycyclohex-2-enone: reaction of 4-hydroxycyclohex-2-enone and 4-hydroxycyclopent-2-enone with some thiols
摘要:
A new route to (R)-4-hydroxycyclohex-2-enone from cyclohexanedione monoketal (27% yield) commences with reaction of the ketal with nitrosobenzene catalysed by L-proline. 4-Hydroxycyclohex-2-enone and 4-hydroxycyclopent-2-enone react with thiols to afford the corresponding syn-disubstituted cycloalkanones. (c) 2006 Published by Elsevier Ltd.
Facile biocatalytic syntheses of optically active 4-hydroxycyclohex-2-enone and 4-benzylthiacyclopent-2-enone
作者:Ben S. Morgan、Dorothée Hoenner、Paul Evans、Stanley M. Roberts
DOI:10.1016/j.tetasy.2004.07.042
日期:2004.9
Novozyme 435(R) (Candida antarctica Lipase B) effects the kinetic resolution of both 3-benzylthia-4-hydroxycyclopentanone and its six-membered ring analogue, providing a novel route to both enantiomers of 4-benzylthiacyclopent-2-enone and the two enantiomers of 4-hydroxycyclohex-2-enone, all in a state of very high optical purity. (C) 2004 Elsevier Ltd. All rights reserved.