合成路线:By cyclocondensation of 3-chloro-6-fluoro-2-(trifluoromethyl)benzaldehyde (I),isopropyl 3-aminocrotonate (II) and methyl 4-fluoroacetylacetate (III) by heating at 110 C.The starting products are prepared as follows:Aldehyde (I) is obtained by reaction of 1-chloro-4-fluoro-3-(trifluoromethyl)benzene (IV) with N-methyl-N-phenylformamide (V) by means of butyllithium in TNF.Aminocrotonate (II) is obtained by reaction of isopropyl acetoacetate (VI) with dry ammonia in methanol.Finally,the acylation of 2,2-dimethyl-1,3-dioxane-4,6-dione (VII) with fluoroacetyl chloride (VIII) by means of pyridine in dichloromethane gives 5-(fluoroacetyl)-2,2-dimethyl-1,3-dioxane-4,6-dione (IX),which is then treated with refluxing methanol to give 4-fluoroacetylacetate (III).
参考文献标题:Dihydropyridine derivs.
文献作者:Baxter,A.J.G.; Dixon,J.; Gould,K.J.; Tinker,A.C.(Celltech Group plc)
参考来源:EP 0174131; ES 8800154; ES 8801632; JP 1986065867
合成路线:By cyclocondensation of 3-chloro-6-fluoro-2-(trifluoromethyl)benzaldehyde (I),isopropyl 3-aminocrotonate (II) and methyl 4-fluoroacetylacetate (III) by heating at 110 C.The starting products are prepared as follows:Aldehyde (I) is obtained by reaction of 1-chloro-4-fluoro-3-(trifluoromethyl)benzene (IV) with N-methyl-N-phenylformamide (V) by means of butyllithium in TNF.Aminocrotonate (II) is obtained by reaction of isopropyl acetoacetate (VI) with dry ammonia in methanol.Finally,the acylation of 2,2-dimethyl-1,3-dioxane-4,6-dione (VII) with fluoroacetyl chloride (VIII) by means of pyridine in dichloromethane gives 5-(fluoroacetyl)-2,2-dimethyl-1,3-dioxane-4,6-dione (IX),which is then treated with refluxing methanol to give 4-fluoroacetylacetate (III).
参考文献标题:FPL-62129XX
文献作者:Prous,J.; Castar,J.
参考来源:Drugs Fut 1989,14(2),121
产品链接: CAS No. 95445-79-7››