| 摘要 |
A process for producing an organotitanium compound capable of regioselectively converting a substituted acetylene compound into polysubstituted benzene or polysubstituted pyridine. The process comprises reacting an acetylene compound represented by the formula (1) [where R<1 >and R<2 >denote a C1-20 alkyl group or the like] in the presence of a prescribed titanium compound and a Grignard reagent with a compound represented by the formula (4) [where R<3 >and R<4 >denote a hydrogen atom or the like] and further reacting with a compound represented by the formula (5) [where R<5 >denotes a hydrogen atom or the like, Z denotes CR' (where R' denotes a hydrogen atom or the like), nitrogen atom, X<6 >denotes a halogen atom or the like, and m is 0 or 1] thereby giving the titanium compound represented by the formula (6) and/or (7). [where R<1>~R<5>, Z, X<6>, and m are defined as above; and X<p >and X<q >denote any of X<1>~X<4>].
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