申请人:Creanova Inc.
公开号:US06271410B1
公开(公告)日:2001-08-07
C3-12 alkyl, substituted alkyl, alkenyl and cycloalkyl cyanoacetates are prepared by an efficient and simplified one-step process in which a small molar excess of the corresponding alcohol, i.e., C3-12 alkyl, substituted alkyl, alkenyl or cycloalkenyl alcohol is reacted with crystalline cyanoacetic acid, or a concentrated aqueous solution of cyanoacetic acid, in the presence of an acid catalyst, such as, for example, methanesulfonic acid, p-toluenesulfonic acid, sulfuric acid and phosphoric acid at a temperature in the range of from about 60° C. to about 150° C., in accordance with the following reaction:
CNCH2COOH+R—OH→(cat)CNCH2COOR+H2O (I)
where R is a C3-12 alkyl, substituted alkyl, alkenyl or cycloalkyl.
C3-12烷基,取代烷基,烯基和环烷基的氰乙酸酯可以通过高效而简化的一步法制备,其中与结晶的氰乙酸或浓缩的氰乙酸水溶液在酸催化剂(例如甲磺酸,对甲苯磺酸,硫酸和磷酸)的存在下反应,反应温度在约60℃至约150℃的范围内,反应方程式如下: CNCH2COOH + R-OH →(催化剂)CNCH2COOR + H2O(I),其中R是C3-12烷基,取代烷基,烯基或环烷基。