申请人:Lonza Ltd.
公开号:US04956473A1
公开(公告)日:1990-09-11
2-Aza-4-(alkoxycarbonyl)spiro[4,5]-decan-3-one and a process for the production of it, starting either from cyclohexylidene malonic acid esters or cyclohexylidene cyanoalkylates. The cyclohexylidene malonic acid ester is reacted with hydrocyanic acid in the presence of a catalytic amount of alkali cyanide or with a stoichiometric amount of alkali cyanide, in an alcohol, and subsequently treated with an acid. The resultant (1-cyanocyclohexyl) malonic acid dialkyl ester is converted by catalytic hydrogenation into the product. The cyclohexylidene cyanoalkylate is reacted with a stoichiometric amount of alkali cyanide, in an alcohol or with hydrocyanic acid in the presence of a catalytic amount of an alkali cyanide. The resultant (1-cyanocyclohexyl)-cyanoacetic acid alkyl ester is reacted in an alcohol in an acid to provide (1-cyanocyclohexyl) malonic acid dialkyl ester. The later ester is converted by catalytic hydrogenation into the product. Process of using the product for the production of 1-(aminomethyl)cyclohexane acetic acid by converting the product with HCl or sulfuric acid at an elevated temperature.
2-Aza-4-(烷氧羰基)螺[4,5]-癸烷-3-酮及其生产方法,可以从环己烯基丙二酸酯或环己烯基氰烷酸酯出发。将环己烯基丙二酸酯与氢氰酸在碱性氰化物的催化剂存在下或与等量的碱性氰化物在醇中反应,然后用酸处理。所得的(1-氰基环己基)丙二酸二烷基酯经催化氢化转化为产物。环己烯基氰烷酸酯与等量的碱性氰化物在醇中反应,或者在碱性氰化物的催化剂存在下与氢氰酸反应。所得的(1-氰基环己基)-氰乙酸烷基酯在酸性条件下在醇中反应,形成(1-氰基环己基)丙二酸二烷基酯。后者经催化氢化转化为产物。使用该产物生产1-(氨甲基)环己烷乙酸的方法是将产物与HCl或硫酸在高温下反应。