| http://www.w3.org/ns/prov#value | - The reaction is profitably conducted under heating, for example, at temperatures of 100 200C, suitably l 150C. In addition, when compounds of the formula (III) in which R' is a hydrogen atom is used in the reaction, the compounds of this invention represented by the formula (I) in which R is a lower alkyl group or an aralkyl group can be obtained by alkylating or aralkylating by conventional proce
|
