Abstract:
Production of Beta -ionone by reaction of 3,7-dimethylocten(7)-yn-(1)-ol-(3) with a lower alkanol ester of acetoacetic acid at a temperature of from 100* to 400*C and treating the reaction mixture with an acid catalyst at a temperature of from 100* to 400*C and cyclizing the 6,10-dimethylundecatrien-(3,5,10)-one-(2) obtained by contacting with concentrated sulfuric acid at temperatures of from -30 to +20*C.
Abstract:
Production of Beta -ionone by reaction of 3,7-dimethylocten(7)-yn-(1)-ol-(3) with diketene to form the acetoacetic ester of 3,7-dimethylocten-(7)-yn-(1)-ol-(3), decomposing the same at 100* to 400*C in the presence of an acid catalyst and/or after treating the mixture in the presence of the catalyst and cyclizing the 6,10-dimethylundecatrien-(3,5,10)-one-(2) obtained by treatment with concentrated sulfuric acid at temperatures of from -30* to 20*C.
Abstract:
Process for the preparation of granular vitamin A esters by contacting the molten vitamin A esters with a cold organic liquid kept in motion.