申请人:Merck & Co., Inc.
公开号:US04150235A1
公开(公告)日:1979-04-17
Novel interphenylene derivatives of 11,12-secoprostaglandins are prepared by the stepwise alkylation of the ethyl ester or the t-butyl ester of acetoacetic acid. One such method involves treatment of the t-butyl ester of acetoacetic acid with a strong base to form the anion followed by treatment with ethyl p-(3-bromopropyl)benzoate to produce ethyl 4-(4-tert-butoxycarbonyl-5-oxo-hexyl)benzoate, subsequently reacting the anion of the thus-formed benzoate with 1-chloro-4-acetoxynonane to produce ethyl 4-(4-acetyl-4-tert-butoxycarbonyl-8-acetoxytridecyl)benzoate followed by decarboxylation and alkaline hydrolysis to produce the desired product 4-(4-acetyl-8-hydroxytridecyl)benzoic acid which is useful as pharmaceutical in the treatment of patients with renal failure and in the prevention of transplant rejection.
通过乙酰乙酸乙酯或叔丁基乙酸乙酯的逐步烷基化制备了11,12-secoprostaglandins的新型间苯基衍生物。其中一种方法涉及将叔丁基乙酸乙酯用强碱处理形成阴离子,随后用乙基对-(3-溴丙基)苯甲酸酯处理以产生乙基4-(4-叔丁氧羰基-5-氧代己基)苯甲酸酯,随后将所形成苯甲酸酯的阴离子与1-氯-4-乙酰氧基壬烷反应,以产生乙基4-(4-乙酰基-4-叔丁氧羰基-8-乙酰氧基十三烷基)苯甲酸酯,随后进行脱羧和碱性水解以产生所需的4-(4-乙酰基-8-羟基十三烷基)苯甲酸,该化合物可用于治疗肾功能衰竭患者和预防移植排斥反应。