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    • 95. 发明申请
    • PROCESS FOR PREPARING KETONE ENANTIOMER
    • 制备酮酮的方法
    • WO1993012062A1
    • 1993-06-24
    • PCT/US1992007654
    • 1992-09-15
    • PFIZER INC.QUALLICH, George, J.
    • PFIZER INC.
    • C07C49/697
    • C07D307/58C07B57/00C07C45/46C07C49/697C07C51/09C07C51/367C07C67/31C07C303/28C07F7/1804C07C57/58C07C59/56C07C309/66
    • A novel multi-step process for preparing the (4S &cir& _-enantiomer of 4-(3,4-dichlorophenyl)-3,4-dihydro-1(2H)-naphthalenone in a highly-optically pure form is disclosed. The process involves (1) first esterifying 4-(3,4-dichlorophenyl)-4-ketobutanoic acid with isopropylene or isobutylene to form the corresponding isopropyl or t &cir& _e &cir& _r &cir& _t &cir& _.-butyl 4-(3,4-dichlorophenyl)-4-ketobutanoate; (2) then reducing the ketobutanoic acid ester obtained in the first step with an asymmetric carbonyl reducing agent to form the corresponding chiral isopropyl or t &cir& _e &cir& _r &cir& _t &cir& _.-butyl 4-(3,4-dichlorophenyl)-(4R &cir& _)-hydroxybutanoate; (3) then sulfonylating the (4R &cir& _)-hydroxybutanoic acid ester with methanesulfonyl, benzenesulfonyl or p &cir& _-toluenesulfonyl chloride or bromide in the presence of a standard base to yield the corresponding isopropyl or t &cir& _e &cir& _r &cir& _t &cir& _.-butyl 4-(3,4-dichlorophenyl)-(4R &cir& _)-sulfonyloxybutanoate; (4) next subjecting the 4-sulfonyloxybutanoic acid ester obtained in the third step to a copper-coupling reaction with dilithium diphenyl(cyano)cuprate of the formula PHI 2Cu(CN)Li2 to effect a stereochemical displacement of the organic (4R &cir& _)-sulfonyloxy group of the (4R &cir& _)-sulfonyloxybutanoic acid ester by the phenyl group of the dilithium diphenylcuprate reagent and so selectively form the corresponding isopropyl or t &cir& _e &cir& _r &cir& _t &cir& _.-butyl 4-(3,4-dichlorophenyl)-(4R &cir& _)-phenylbutanoate, and (5) thereafter cyclizing the stereospecific (4R &cir& _)-phenylated n-butanoic acid ester in the presence of a protic or Lewis acid catalyst to finally yield the desired (4S &cir& _)-4-(3,4-dichlorophenyl)-3,4-dihydro-1(2H)-naphthalenone compound in a highly-optically pure form. The latter compound, which is a novel (4S &cir& _)-enantiomer per se, has utility as an intermediate that ultimately leads to pure c &cir& _i &cir& _s &cir& _-(1S &cir& _)(4S &cir& _)N-methyl-4-(3,4-dichlorophenyl)-1,2,3,4-tetrahydro-1-naphthaleneamine (sertraline), which is a known antidepressant agent. The aforementioned isopropyl and t &cir& _e &cir& _r &cir& _t &cir& _.-butyl esters of 4-(3,4-dichlorophenyl)-(4R &cir& _)-hydroxybutanoic acid, as well as their corresponding (4R &cir& _)-methanesulfonyl, (4R &cir& _)-benzenesulfonyl and (4R &cir& _)-p &cir& _-toluenesulfonyl derivatives, are also novel compounds, as are the aforementioned isopropyl and t &cir& _e &cir& _r &cir& _t &cir& _.-butyl esters of 4-(3,4-dichlorophenyl)-(4R &cir& _)-phenylbutanoic acid as well as the aforesaid acid per se. These novel chiral compounds are all useful as key intermediates in the overall process of the present invention.
    • 公开了一种用于以高光学纯度形式制备4-(3,4-二氯苯基)-3,4-二氢-1(2H) - 萘酮的(4S +) - 对映异构体的新型多步法。 包括(1)首先用异丙烯或异丁烯酯化4-(3,4-二氯苯基)-4-酮丁酸,形成相应的异丙基或叔丁基4-(3,4-二氯苯基) )-4-酮丁酸酯;(2)然后用不对称羰基还原剂还原第一步得到的酮丁酸酯形成相应的手性异丙基或叔丁基4-(3, (4R)和(R) - 羟基丁酸酯;(3)然后在标准碱的存在下,用甲磺酰基,苯磺酰基或对甲苯磺酰氯或溴化物磺酰化(4R和C) - 羟基丁酸酯,得到 相应的异丙基或叔丁基4-(3,4-二氯苯基) - (4R和C) - 磺酰氧基丁基 吃了; (4)接着将第三步骤中得到的4-磺酰氧基丁酸酯与式PHI 2Cu(CN)Li 2的二苯基二苯基(氰基)铜盐进行铜偶联反应,以进行有机(4R& (4R和C 1 -C 6) - 磺酰氧基丁酸酯的苯基磺酰氧基),并选择性地形成相应的异丙基或叔丁基4-(3,4 (4R)和苯基丁酸酯,和(5)然后在质子或路易斯酸催化剂的存在下环化立体定向(4R和C 1 -C 6) - 苯基的正丁酸酯,最终得到所需的(4S& _)-4-(3,4-二氯苯基)-3,4-二氢-1(2H) - 萘酮化合物,为高光学纯的形式。 后一种化合物,它是一种新型的(4S和Cir) - 对映异构体本身,具有作为中间体的作用,最终导致纯化合物(1S&cir)和(4S)和(c) 4-(3,4-二氯苯基)-1,2,3,4-四氢-1-萘胺(舍曲林),其是已知的抗抑郁剂。 上述异丙基和叔丁基-4-(3,4-二氯苯基) - (4R和C 1-6烯基) - 羟基丁酸的叔丁酯以及它们相应的(4R和C 1-6烷基) - 甲磺酰基, (4R和C 1-6)苯磺酰基和(4R和C 1-4 - 苯基) - 甲苯磺酰基衍生物也是新化合物,如上述异丙基和叔丁基酯的4-(3 ,4-二氯苯基) - (4R和C 1-6)苯基丁酸,以及上述酸本身。 这些新型手性化合物在本发明的整个方法中都可用作关键中间体。