Abstract
This paper deals with the synthesis of α-irone from 2, 3-dimethyl-1, 3-butadiene and methyl acetoacetate. The reaction of 2, 3-dimethyl-1, 3-butadiene with methyl acetoacetate by the catalyst composed of palladous chloride and P-phenyl-1-phospha-3-methyl-3-cyclopentene gave 3-carbomethoxy 5, 6-dimethyl-5-hepten-2-one (1 : 1 adduct). From this ketone, α-irone was prepared by the combinations of standard synthetic reactions.
