Diastereoface differentiating peracid oxidation of the enol ether derived from cyclohexanone and 2,4-pentanediol: Preparation of optically pure 2-hydroxycyclohexanone acetal
摘要:
Diastereoface differentiating m-chloroperbenzoic acid oxidation of the chiral enol ether prepared from cyclohexanone and optically active 2,4-pentanediol proceeded from -72 to 39-degrees-C to give a diastereomeric mixture of the corresponding 2-hydroxycyclohexanone acetal. The diastereomeric excess of the product reached almost 100 % at -72-degrees-C.
Diastereoface-differentiating oxidation of 1-cyclohexenyl ether using a 2,4-pentanediol tether
摘要:
Diastereoface-differentiating oxidation of the chiral enol ether prepared from cyclohexanone and optically active 2,4-pentanediol gave a diastereomeric mixture of the corresponding 2-hydroxycyclohexanone acetal. The diastereomeric excess of the product reached over 99% by oxidation with m-chloroperbenzoic acid at -78 degrees C. Oxidation with t-butyl hydroperoxide in the presence of metal catalysts also resulted in high diastereomeric excesses of up to 97%. (C) 1998 Elsevier Science Ltd. All rights reserved.