PROCESS FOR PREPARING alpha-FARNESENES AND 4-SUBSTITUTED 3-METHYL-1,3-BUTADIENE COMPOUND HAVING RELATED STRUCTURE, AND SYNTHETIC INTERMEDIATE COMPOUND THEREOF

Abstract: the present invention provides a process for preparing a 4-substituted 3-methyl-1,3-butadiene compound of the following general formula (a), wherein r represents a linear, branched, or cyclic hydrocarbon group having 1 to 20 carbon atoms and optionally having an unsaturated bond(s), the process comprising steps of subjecting a primary allylsulfone compound of the following general formula (d), wherein r represents a linear, branched, or cyclic hydrocarbon group having 1 to 20 carbon atoms and optionally having an unsaturated bond(s), x represents a halogen atom, and w represents an arenesulfonyl group, to a reductive removal of the arenesulfonyl group, w, to form a halide compound of the following general formula (b), wherein r represents a linear, branched, or cyclic hydrocarbon group having 1 to 20 carbon atoms and optionally having an unsaturated bond(s), and x represents a halogen atom; and subjecting the aforesaid halide compound (b) to an elimination reaction of a hydrogen halide, hx, to form the aforesaid 4-substituted 3-methyl-1,3-butadiene compound (a).

Inventor(s): Takeshi KINSHO, Yusuke NAGAE, Akihiro BABA, Takeru WATANABE

CPC Classification: C07C1/322 (ACYCLIC OR CARBOCYCLIC COMPOUNDS)

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