Facile preparation of methyl 5-aryl-4-hydroxyhex-2(E)-enoate, chiral synthon of bisabolane-type sesquiterpenes, based on lipase-catalyzed kinetic resolution and rearrangement of an aryl group
作者:Mikio Fujii、Sumie Yasuhara、Hiroyuki Akita
DOI:10.1016/j.tetasy.2009.04.015
日期:2009.6
active 1a–h, solvolysis of brosylates 13a–h afforded the corresponding methyl (4S∗,5S∗)-5-aryl-4-hydroxyhex-2(E)-enoates 3a–h (26–94% yield). The yields of 3a and 3c on the solvolysis of the corresponding 13 were 92% and 40%, respectively, while solvolysis of the corresponding tosylate was reported at 70% and 17%, respectively. This procedure is a facile and practical route to the synthesis of bioactive
外消旋甲基(4 S *,5 S *)-4-芳基-5-羟基己二-2(E)-烯酸酯1a - h的脂肪酶催化对映选择性乙酰化反应,通过使用可以达到有效的拆分度(E > 400) CAL-B。将获得的旋光化合物1a – h溴化后,对溴化物13a – h进行溶剂分解,得到相应的甲基(4 S ∗,5 S ∗)-5-芳基-4-羟基己2(E)-烯酸酯3a – h(26 –94%的收率)。的产量3a和3c对相应的13个溶剂化物的溶剂分解分别为92%和40%,而据报道相应的甲苯磺酸盐的溶剂化分别为70%和17%。该程序是合成生物活性和光学活性双五硼烷型倍半萜烯的简便实用途径。