(25R)- and (25S)-25-hydroxy-27-nor-cholesterol 1c, were prepared by enzymatic resolution of the stereogenic center in the side chain of compound 4a or by synthesis of the side chain using, as a chiral synthon, the enantiomerically pure phenylsulfonyl alkanol 6a prepared by different biocatalytic approaches. (C) 1999 Elsevier Science Ltd. All rights reserved.
(25R)-和(25S)-25-羟基-27-nor-
胆固醇1c是通过酶解分辨率处理化合物4a侧链中的手性中心,或者通过将作为手性试剂的对映体纯的对
甲苯磺酰基醇6a(采用不同
生物催化方法制备)用于侧链的合成制得的。(C)1999 Elsevier Science Ltd. 保留所有权利。