申请人:Roche Colorado Corporation
公开号:US05808088A1
公开(公告)日:1998-09-15
A method of preparing 2-\x9b2-\x9b3-(1H-benzimidazol-2-yl)propyl!methylamino)}ethyl!-6-fluoro-1-isopr opyl-1,2,3,4-tetrahydronaphthalen-2-yl methoxyacetate comprises contacting 6-fluoro-1-isopropyl-3,4-dihydro-1H-naphthalen-2-one with the dianion of N-\x9b3-(1H-benzimidazol-2-yl)propyl!-N-methylacetamide to form N-\x9b3-(1H-benzimidazol-2-yl)propyl!-2-(6-fluoro-2-hydroxy-1-isopropyl-1,2,3 ,4-tetrahydronaphthalen-2-yl)-N-methylacetamide, reducing this to 2-\x9b2-\x9b3-(1H-benzimidazol-2-yl)propyl!methylamino}ethyl!-6-fluoro-1-isopro pyl-1,2,3,4-tetrahydronaphthalen-2-ol, and treating the 2-\x9b2-\x9b3-(1H-benzimidazol-2-yl)propyl!methylamino}ethyl!-6-fluoro-1-isopro pyl-1,2,3,4-tetrahydronaphthalen-2-ol with methoxyacetic acid or an activated derivative of methoxyacetic acid. The invention is particularly applicable to the preparation of mibefradil, (lS,2S)-2-\x9b2-\x9b3-(1H-benzimidazol-2-yl)propyl!methylamino}ethyl!-6-fluoro- 1-isopropyl-1,2,3,4-tetrahydronaphthalen-2-yl methoxyacetate, and its dihydrochloride salt. N-\x9b3-(1H-Benzimidazol-2-yl)propyl!-N-methylacetamide, and the acetic acid solvate of 2-\x9b2- \x9b3-(1H-benzimidazol-2-yl)propyl!methylamino}ethyl!-6-fluoro-1-isopropyl-1 ,2,3,4-tetrahydronaphthalen-2-ol dioxalate, are new.
一种制备2-\x9b2-\x9b3-(1H-苯并咪唑-2-基)丙基!甲基氨基)}乙基!-6-氟-1-异丙基-1,2,3,4-四氢萘-2-基甲氧基乙酸酯的方法包括将6-氟-1-异丙基-3,4-二氢-1H-萘-2-酮与N-\x9b3-(1H-苯并咪唑-2-基)丙基!-N-甲基乙酰胺的二阴离子接触以形成N-\x9b3-(1H-苯并咪唑-2-基)丙基!-2-(6-氟-2-羟基-1-异丙基-1,2,3,4-四氢萘-2-基)-N-甲基乙酰胺,将其还原为2-\x9b2-\x9b3-(1H-苯并咪唑-2-基)丙基!甲基氨基}乙基!-6-氟-1-异丙基-1,2,3,4-四氢萘-2-醇,然后用甲氧基乙酸或甲氧基乙酸的活性衍生物处理2-\x9b2-\x9b3-(1H-苯并咪唑-2-基)丙基!甲基氨基}乙基!-6-氟-1-异丙基-1,2,3,4-四氢萘-2-醇。该发明特别适用于制备米贝伐利(lS,2S)-2-\x9b2-\x9b3-(1H-苯并咪唑-2-基)丙基!甲基氨基}乙基!-6-氟-1-异丙基-1,2,3,4-四氢萘-2-基甲氧基乙酸酯及其双盐酸盐。N-\x9b3-(1H-苯并咪唑-2-基)丙基!-N-甲基乙酰胺和2-\x9b2-\x9b3-(1H-苯并咪唑-2-基)丙基!甲基氨基}乙基!-6-氟-1-异丙基-1,2,3,4-四氢萘-2-醇草酸二乙酸盐的乙酸溶剂化物是新的。