作者:Stephen V. Attwood、Anthony G. M. Barrett、Robin A. E. Carr、Geoffrey Richardson
DOI:10.1039/c39860000479
日期:——
(+)-Milbemycin β3(1) was prepared by total synthesis from (6S,8R,9S)-methyl 8,9-dimethyl-4-oxo-1,7-dioxaspiro[5.5]undeco-2-ene-2-carboxylate (2), (4R,6R)-4-methyl-6-phenylsulphonyl-(E)-hept-2-en-1-ol (3a), and 2-ethyl-4-methoxy-5-methylbenzoic acid (4) using Julia–Lythgoe and benzylic anion chemistry to establish the carbon framework and a Mitsunobu reaction to close the lactone ring.
(+) -米尔倍霉素β 3(1),由(6制备通过全合成小号,8 - [R 9小号) -甲基-8,9-二甲基-4-氧代-1,7-二氧杂螺[5.5] undeco -2-烯-2-羧酸酯(2),(4 R,6 R)-4-甲基-6-苯基磺酰基-(E)-庚-2-烯-1-醇(3a)和2-乙基-4-甲氧基-5-甲基苯甲酸(4)使用Julia–Lythgoe和苄基阴离子化学方法建立碳骨架,并经Mitsunobu反应关闭内酯环。