Diastereoselective Synthesis of 2,3-<i>anti</i>-5-Benzyloxy-2,4-dimethyl-1,3-pentanediols via Cyclic Hydroboration
作者:Yasushi Yokoyama、Yuji Terada、Hideyuki Kawashima
DOI:10.1246/bcsj.64.2563
日期:1991.8
The treatment of (2E,4S)- and (2Z,4S)-1-benzyloxy-5-ethenyloxy-2,4-dimethyl-2-pentene with borane both with and without a catalytic amount of Rh(Ph3P)3Cl gave 2,3-anti-3,4-anti-(2R,3R,4S)- and 2,3-anti-3,4-syn-(2R,3R,4R)-5-benzyloxy-2,4-dimethyl-1,3-pentanediols, respectively, with fair to good diastereoselectivity.
(2E,4S)- 和 (2Z,4S)-1-benzyloxy-5-ethenyloxy-2,4-dimethyl-2-pentene 用硼烷在有和没有催化量的 Rh(Ph3P)3Cl 的情况下处理得到 2 ,3-抗-3,4-抗-(2R,3R,4S)-和2,3-抗-3,4-syn-(2R,3R,4R)-5-苄氧基-2,4-二甲基- 1,3-戊二醇,分别具有一般到良好的非对映选择性。