| 摘要 |
<p>Provided is a method for producing a compound expressed by the following formula (3):
[where R 1 represents a hydrogen atom or C 1-4 alkyl group, and R 2 represents C 1-4 alkyl group, C 1-4 alkoxy group, aryl group, aryloxy group or benzyloxy group], the method comprising a reaction of dehydro-condensing a compound expressed by the following formula (1):
[where R 1 represents the same meaning as defined above], and a compound expressed by the following formula (2):
[where R 2 represents the same meaning as defined above], while being converted to a desired geometric isomer in the presence or absence of an acid catalyst, under a condition that an organic solvent to be used for the reaction is a mixed solvent of acetic acid and a solvent selected from the group consisting of toluene, xylene and chlorobenzene, and a mixing ratio of acetic acid to the other solvent is from 1:3 to 1:5 in volume, wherein the reaction is conducted under heating and refluxing.</p> |
