Process for producing 2-methyl-1,3-cyclohexanedione and 2-methyl

Details Process for producing 2-methyl-1,3-cyclohexanedione and 2-methyl Process for producing 2-methyl-1,3-cyclohexanedione and 2-methyl

1992-08-21

1994-01-04

Reamer, James H.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

564446, 568772, C07C 4565

Patent

active

052761983

ABSTRACT:
A process for producing 2-methyl-1,3-cyclohexanedione which comprises subjecting 1,3-cyclohexanedione, formaldehyde and a dialkylamine to Mannich reaction to obtain a 2-dialkylaminomethyl-1,3-cyclohexanedione, and subjecting the 2-dialkylaminomethyl to hydrogenolysis, and a process for producing 2-methylresorcinol which comprises aromatizing 2-methyl-1,3-cyclohexanedione obtained. According to these processes, it is possible to produce high-purity 2-methylresorcinol and 2-methyl-1,3-cyclohexanedione commercially easily and advantageously.

REFERENCES:
patent: 3100205 (1963-08-01), Schulte et al.
patent: 3969409 (1976-07-01), Miyano et al.
patent: 4160113 (1979-07-01), Muller et al.
patent: 4212823 (1980-07-01), Muller
patent: 4250336 (1981-02-01), Muller et al.
patent: 4431848 (1984-02-01), Greco
ORGANIC SYNTHESIS, (1973), pp. 743-746, MEKLER et al., "2-Methyl-1,3-cyclohexanedione* (1,3-Cyclohexanedione, 2-methyl-)".
CHEM. zvesti 35 (1) 119-126 (1981), J. Sraga et al., "Methylation of 1,3-cyclopentanedione, 1,3-cyclohexanedione, and 1,3-cycloheptanedione with iodomethane in aprotic solvents in the absence and in the presence of 18-crown-6".

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