Process for the preparation of 1,3-diaza-spiro (4.4) non-1-en-4-one derivatives and 1-cyano-1-acylamino-cyclopentane intermediates
申请人:Sanofi-Synthelabo
公开号:US06239286B1
公开(公告)日:2001-05-29
Process for the preparation of compounds of formula (I) wherein R means hydrogen atom, or C1-6 alkyl group, or C7-12 aralkyl group or phenyl group, characterised in that: a) the compound of formula (III) is reacted with a compound of formula (IV) wherein X means halogen atom or C1-5 alkoxy group or hydroxyl group and the resulting compound of formula (II) is transformed in the presence of an oxidising agent in a reaction medium with pH above 7, into the compound of formula (I), or b) the compound of formula (III) is reacted with an anhydride of general formula (V) and the resulting compound of formula (II) transformed in the presence of an oxidising agent, in a reaction medium with pH above 7, into the compound of formula (I), or c) a compound of formula (II) is transformed in the presence of an oxidising agent, in a reaction medium with pH above 7, into the compound of formula (I), and if desired, the resulting compounds of formula (I), before or after isolation, are transformed into acid addition salts, or the compounds of formula (I) are liberated from their acid addition salts. Thus a process for the preparation of intermediates useful in synthesis of angiotensin II antagonists is disclosed.
根据以下特征,制备化合物的过程,其中R代表氢原子,或C1-6烷基,或C7-12芳基烷基或苯基:a) 化合物III的反应物与化合物IV的反应物反应,其中X代表卤原子或C1-5烷氧基或羟基,生成的化合物II在存在pH高于7的反应介质中,在氧化剂的存在下转化为化合物I;或b) 化合物III与通式V的酐反应,生成的化合物II在存在氧化剂的情况下,在pH高于7的反应介质中转化为化合物I;或c) 化合物II在存在氧化剂的情况下,在pH高于7的反应介质中转化为化合物I,如果需要,在隔离前或隔离后,生成的化合物I转化为酸盐,或从其酸盐中释放化合物I。因此,揭示了一种用于合成血管紧张素II拮抗剂的中间体的制备过程。