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:
Manufacture of penta-2,4-dien-1-als comprising the reaction of propargyl alcohols with Alpha -formylcarboxylic esters at temperatures of from 100* to 350* C. Penta-2,4-dien-1-als are odorants.
Abstract:
A process for the production of pent-4-en-1-als which comprises reacting an allyl alcohol with an Alpha -formylcarboxylic ester at a temperature of from 100* to 350*C. Pent-4-en-1-als are perfumes and have a fresh fruity odor.
Abstract:
Alkyl substituted alkan-1-al-7-ols and their production by reaction of alk-1-en-6-ols in the presence of rhodium and iridium catalysts with carbon monoxide and hydrogen at from 50*C to 200*C and 100 to 1,500 atmospheres.