Microbial Enantioselective Ester Hydrolysis for the Preparation of Optically Active 4,1-Benzoxazepine-3-acetic Acid Derivatives as Squalene Synthase Inhibitors.
作者:Naoki Tarui、Kazuo Nakahama、Yoichi Nagano、Motowo Izawa、Kiyoharu Matsumoto、Masakuni Kori、Toshiaki Nagata、Takashi Miki、Hidefumi Yukimasa
DOI:10.1248/cpb.50.59
日期:——
Microbial enantioselective ester hydrolysis for the preparation of optically active (3R,5S)-(-)-5-phenyl-4,1-benzoxazepine-3-acetic acid derivatives as potent squalene synthase inhibitors was investigated. Pseudomonas diminuta and Pseudomonas taetrolens hydrolyzed the racemic ethyl ester of the 5-(2-chlorophenyl) analogue to yield the (-)-carboxylic acid with excellent enantiomeric excess (>99% ee)
微生物对映体选择性酯水解制备光学活性的(3R,5S)-(-)-5-苯基-4,1-苯并x氮杂-3-乙酸衍生物作为强力角鲨烯合酶抑制剂的研究。假单孢假单胞菌和太子假单胞菌水解5-(2-氯苯基)类似物的外消旋乙酯,得到具有优异对映体过量(> 99%ee)的(-)-羧酸。我们发现(-)-对映体是活性抑制剂。酯部分的蓬松度不影响对映选择性,但确实影响反应性。5-(2-甲氧基苯基)类似物,5-(2,3-二甲氧基苯基)类似物和5-(2,4-二甲氧基苯基)类似物的外消旋乙酯也用太子油假单胞菌水解,得到对映体纯的(-)-大规模羧酸。作为通往(3R,5S)-(-)-7-chloro-5-(2,3-二甲氧基苯基)-1-新戊基-2-氧代-1,2,3,5-四氢-4,1-苯并x氮杂-3-乙酸[(-)-1c],较早的中间体(-)-2-通过不对称水解(+/-)-5-氯-α-(2,3-二甲氧基苯基)成功获得了氨基-5-氯-α-(2