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 a pharmaceutical in the treatment of patients with renal failure and in the prevention of transplant rejection.
11,12-secoprostaglandins的新型
间苯二酚衍
生物是通过
乙酸乙酯或
乙酸叔丁酯的逐步烷基化制备的。其中一种方法涉及将
乙酸叔丁酯用强碱处理以形成阴离子,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,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,然后进行脱羧和碱性
水解以产生所需的产物4-(4-乙酰基-8-羟基
十三烷基)
苯甲酸,该产物可用作药物治疗肾衰竭患者和预防移植排斥的药物。