作者:Iqbal Hussain、Tatsuhiko Komasaka、Masanori Ohga、Junzo Nokami
DOI:10.1055/s-2002-22721
日期:——
3-phenylpropanal 2a via an allyl-transfer reaction from a chiral allyl donor, (1R,2S,5R)-1-allylmenthol, gave (R)-1-phenylhex-5-en-3-ol 3b enantioselectively. The optical yield (ee)of (R)-3b, however, decreased with increasing chemical yield, and the chemical yield increased with increasing reaction time. The racemization takes place via an acid-catalyzed allyl-transfer reaction from (R)-3b to 2a.
通过手性烯丙基供体 (1R,2S,5R)-1-烯丙基薄荷醇的烯丙基转移反应,酸催化 3-苯基丙醛 2a 不对称烯丙基化,得到 (R)-1-苯基己-5-en-3-ol 3b 对映选择性。然而,(R)-3b的光学产率(ee)随着化学产率的增加而降低,并且化学产率随着反应时间的增加而增加。外消旋化通过酸催化的烯丙基转移反应从 (R)-3b 到 2a 发生。