A process for the preparation of 4-[2-(aryl or heterocyclo)-1H-imidazol-1-yl]benzenesulfonamides
申请人:G.D. Searle & Co.
公开号:EP1193265A2
公开(公告)日:2002-04-03
A process to make a compound of the formula
or a pharmaceutically acceptable salt thereof is disclosed
wherein R3 is a radical selected from hydrido, alkyl, haloalkyl, aralkyl, heterocycloalkyl, heteroaralkyl, acyl, cyano, alkaxy, alkylthio, alkylthioalkyl, alkylsulfonyl, cycloalkylthio, cycloalkylthioalkyl, cycloalkylsulfonyl, cycloalkylsulfonylalkyl, haloalkylsulfonyl, arylsulfonyl, halo, hydroxyalkyl, alkoxyalkyl, alkylcarbonyl, arylcarbonyl, aralkylcarbonyl, heterocyclocarbonyl, cyanoalkyl, aminoalkyl, alkylaminoalkyl, N-arylaminoalkyl, N-alkyl-N-arylaminoalkyl, carboxyalkyl, alkoxycarbonylalkyl, alkoxycarbonyl, haloalkylcarbonyl, carboxyl, aminocarbonyl, alkylaminocarbonyl, alkylaminocarbonylalkyl, heteroarylalkoxyalkyl, heteroaryloxyalkyl, heteroarylthioalkyl, aralkoxy, aralkylthio, heteroaralkoxy, heteroaralkylthio, heteroarylalkylthioalkyl, heteroaryloxy, heteroarylthio, arylthioalkyl, aryloxyalkyl, arylthio, aryloxy, aralkylthioalkyl, aralkoxyalkyl, aryl and heteroaryl; wherein R4 is a radical selected from hydrido, alkyl and halo; and wherein R2 is selected from aryl and heterocyclo, wherein R2 is optionally substituted at a substitutable position with one or more radicals independently selected from alkylsulfonyl, aminosulfonyl, halo, alkylthio, alkyl, cyano, carboxyl, alkoxycarbonyl, haloalkyl, hydroxyl, alkoxy, hydroxyalkyl, alkoxyalkyl, haloalkoxy, amino, alkylamino, arylamino and nitro;
said method comprising the steps of forming a (protected sulfonyl)benzenamine, treating said (protected sulfonyl)benzenamine first with a base and then with a nitrile to form an amidine, treating said amidine with a haloketone derivative in the presence of a base to form a hydroxyimidazole, forming a (protected sulfonylphenyl) imidazole by dehydrating said hydroxyimidazole, and forming said compounds by deprotecting said (protected sulfonylphenyl)imidazole.
本发明公开了一种制备式
或其药学上可接受的盐的工艺。
其中 R3 是选自氢基、烷基、卤代烷基、芳基、杂环烷基、杂芳基、酰基、氰基、烷氧基、烷硫基、烷硫基、烷基磺酰基、环烷硫基、环烷硫基、环烷基磺酰基、环烷基磺酰基、卤代烷基磺酰基、芳基磺酰基、卤代烷基磺酰基、卤代芳基磺酰基、卤代芳基磺酰基、环烷基磺酰基、卤代烷基磺酰基、芳基磺酰基、卤代、羟基烷基、烷氧基烷基、烷基羰基、芳基羰基、芳基羰基、杂环羰基、氰基烷基、氨基烷基、烷基氨基烷基、N-芳基氨基烷基、N-烷基-N-芳基氨基烷基、羧基、烷氧基羰基、烷氧羰基、卤代烷基羰基、羧基、氨基羰基、烷基氨基羰基、烷基氨基羰基烷基、杂芳基烷氧基烷基、杂芳氧基烷基、杂芳硫基烷基、杂芳基硫代烷基、杂芳基硫代烷基、杂芳基氧基烷基、杂芳基硫代烷基、芳基硫代烷基、芳基氧基烷基、芳基硫代烷基、芳基氧基烷基、芳基硫代烷基、芳基烷氧基烷基、芳基和杂芳基;其中 R4 是选自氢基、烷基和卤代的基团;以及 其中 R2 选自芳基和杂环基,其中 R2 在可取代的位置上任选被一个或多个独立选自烷基磺酰基、氨基磺酰基、卤代基、烷硫基、烷基、氰基、羧基、烷氧基羰基、卤代烷基、羟基、烷氧基、羟基烷基、烷氧基烷基、卤代烷氧基、氨基、烷基氨基、芳基氨基和硝基的基团取代;
所述方法包括以下步骤:形成(受保护的磺酰基)苯胺,首先用碱处理所述(受保护的磺酰基)苯胺,然后用腈处理以形成脒,在碱存在下用卤代酮衍生物处理所述脒以形成羟基咪唑,通过使所述羟基咪唑脱水形成(受保护的磺酰基苯基)咪唑,以及通过对所述(受保护的磺酰基苯基)咪唑进行脱保护形成所述化合物。