申请人:Chinoin Gyogyszer RT
公开号:US04315861A1
公开(公告)日:1982-02-16
A process is disclosed for preparing a carbamic acid phenyl ester of the formula (I) ##STR1## wherein R is alkyl having 1 to 8 carbon atoms, aryl, cycloalkyl having 5 or 6 carbon atoms, or aralkyl having 7 to 16 carbon atoms, wherein the aryl, cycloalkyl or aralkyl is unsubstituted or substituted by at least one alkyl group having 1 to 8 carbon atoms; R.sub.1 is hydrogen, alkyl having 1 to 4 carbon atoms, alkoxy having 1 to 4 carbon atoms, cyanomethyl, 1,3-dioxolan-2-yl, or carboalkoxyamino wherein the alkoxy group contains 1 to 4 carbon atoms; R.sub.2 is hydrogen, halogen, alkyl having 1 to 4 carbon atoms or alkoxy having 1 to 4 carbon atoms; or R.sub.1 and R.sub.2 form together a carbocyclic ring or a heterocyclic ring fused to the phenyl ring wherein the carbocyclic ring of the heterocyclic ring is unsubstituted or substituted by at least one alkyl having 1 to 8 carbon atoms, which comprises acylating a phenol of the formula (II) ##STR2## with a compound of the formula (IV) ##STR3## in the presence of a base. The compounds obtained are valuable intermediates.
本发明揭示了一种制备式(I)的氨基甲酸苯酯的方法,其中R是具有1至8个碳原子的烷基,芳基,具有5或6个碳原子的环烷基或具有7至16个碳原子的芳基烷基,其中芳基,环烷基或芳基烷基未取代或被至少一个具有1至8个碳原子的烷基取代;R1是氢,具有1至4个碳原子的烷基,具有1至4个碳原子的烷氧基,氰基甲基,1,3-二氧杂环戊烷-2-基或羧基烷氧基氨基,其中烷氧基含有1至4个碳原子;R2是氢,卤素,具有1至4个碳原子的烷基或具有1至4个碳原子的烷氧基;或者R1和R2一起形成一个碳环或与苯环融合的杂环,其中碳环或杂环的碳环未取代或被至少一个具有1至8个碳原子的烷基取代;该方法包括在碱存在下用式(IV)的化合物与式(II)的苯酚酰化。所得化合物是有价值的中间体。