Process for the preparation of optically pure aminophenylthio- and aminoaphthalenylthio-propanoic acids
申请人:F. HOFFMANN-LA ROCHE AG
公开号:EP0343474A2
公开(公告)日:1989-11-29
A process for preparing an acid of the general formula
wherein R₁ and R₂ are each, independently, hydrogen, alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms, halogen, trifluoromethyl or nitro or R₁ and R₂, taken together with the benzene ring to which they are attached, are naphthalene and Ar is phenyl which is unsubstituted or substituted by one to three substituents selected from the group consisting of alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms and halogen,
by hydrolyzing a compound of the formula
The compounds of formula I formed by the process of the invention are useful in the production of thiazepin-4(5H)-ones of the formula
and anaogs thereof which have activity as calcium channel blockers and accordingly are useful as agents for lowering blood pressure and as agents for treating ischemia.
一种制备通式如下的酸的工艺
其中 R₁ 和 R₂ 各自独立地为氢、1 至 4 个碳原子的烷基、1 至 4 个碳原子的烷氧基、卤素、三氟甲基或硝基,或 R₁ 和 R₂ 与它们所连接的苯环一起为萘,Ar 为未被取代或被 1 至 3 个选自 1 至 4 个碳原子的烷基、1 至 4 个碳原子的烷氧基和卤素的取代基取代的苯基、
水解式如下的化合物
通过本发明工艺形成的式 I 化合物可用于生产式中的硫氮杂卓-4(5H)-酮及其类似物。
及其类似物,它们具有钙通道阻滞剂的活性,因此可用作降低血压和治疗缺血的药物。