| abstract |
The present invention relates to a method for producing unsaturated acid and/or unsaturated acid ester, which comprises: making compound (1) represented by the following formula (1) react in Bronsted acid at a temperature of 0°C to 350°C React under the presence of catalyzer and/or Lewis acid catalyst and prepare the step A of the compound (2) represented by following formula (2) (herein, R , R 2 and R 4 are independently hydrogen atom, deuterium atom or an alkyl group, R3 and R5 are independently a hydrogen atom or a deuterium atom, R6 is a hydrogen atom, a deuterium atom, an alkyl group or an aryl group, and X is a chlorine atom, a fluorine atom, a bromine atom or an iodine atom). |