Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
2006-10-24
2006-10-24
Dentz, Bernard (Department: 1625)
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
C546S010000, C548S108000, C549S003000, C549S212000, C556S012000, C556S052000
Reexamination Certificate
active
07125999
ABSTRACT:
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 R1and R2denote a C1-20alkyl 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 R3and R4denote a hydrogen atom or the like] and further reacting with a compound represented by the formula (5)[where R5denotes a hydrogen atom or the like, Z denotes CR′ (where R′ denotes a hydrogen atom or the like), nitrogen atom, X6denotes 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 R1˜R5, Z, X6, and m are defined as above; and Xpand Xqdenote any of X1˜X4].
REFERENCES:
Saito, Chem. Rev., vol. 100, No. 8, pp. 2901-2915 (2000).
Wakatsuki, J. Chem. Soc., Dalton, pp. 1278-1282 (1978).
Takahashi, J. Am. Chem. Soc., vol. 122, No. 20, pp. 4994-4995 (2000).
Birch & Stewart Kolasch & Birch, LLP
Dentz Bernard
Nissan Chemical Industies, Ltd.
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