AbstractChiral intermediates were prepared by biocatalytic processes for the chemical synthesis of four pharmaceutical drug candidates. These include: (i) the microbial reduction of 3,5‐dioxo‐6‐(benzyloxy) hexanoic ethyl ester to (3S,5R)‐dihydroxy‐6‐(benzyloxy) hexanoic acid ethyl ester, an intermediate for a new anticholesterol drug; (ii) synthesis of (2R,3S)‐(‐)‐N‐benzoyl‐3‐phenyl isoserine ethyl ester, a taxol side‐chain synthon; (iii) the microbial oxygenation of 2,2‐dimethyl‐2H‐1‐benzopyran‐6‐carbonitrile to the corresponding (3S,4S) epoxide and (3S,4R)‐trans diol, intermediates for synthesis of potassium channel opener; (iv) the biotransformation of (exo,exo)‐7‐oxabicyclo [2.2.1] heptane‐2,3‐dimethanol to the corresponding chiral lactol and lactone, intermediates for thromboxane A2 antagonist.
摘要 通过生物催化过程制备了手性中间体,用于四种候选药物的化学合成。这些中间体包括(i) 微生物将 3,5-二氧代-6-(苄氧基)己酸乙酯还原为(3S,5R)-二羟基-6-(苄氧基)己酸乙酯,这是一种新型抗胆固醇药物的中间体;(ii) 合成(2R,3S)-(-)-N-苯甲酰基-3-苯基异丝氨酸乙酯,这是一种紫杉醇侧链合成物;(iii) 微生物氧合 2,2-二甲基-2H-1-苯并吡喃-6-甲腈,生成相应的(3S,4S) 环氧化物和(3S,4R)-反式二醇,这是合成钾通道开放剂的中间体;(iv) 生物转化(exo,exo)-7-氧杂双环[2.2.1]庚烷-2,3-二甲醇的生物转化,生成相应的手性内醇和内酯,这是血栓素 A2 拮抗剂的中间体。