Method of preparation for aromatic N-substituted halo-substitute

Details Method of preparation for aromatic N-substituted halo-substitute Method of preparation for aromatic N-substituted halo-substitute

1978-04-10

1980-07-01

Berch, Mark L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D20738

Patent

active

042105897

ABSTRACT:
Process for the preparation of monocyclic aromatic N-substituted halo-2-pyrrolidinones having the formula ##STR1## in which X is hydrogen, chlorine or methyl; Y is hydrogen, chlorine or bromine, Z is chlorine or bromine; R.sub.2 is alkyl or hydrogen; R is hydrogen, alkyl, acetyl, chlorine, bromine, fluorine, iodine, trifluoromethyl, nitro, cyano, alkoxy, alkylthio, alkylsulfinyl, alkylsulfonyl, trifluoromethylthio, trifluoromethylsulfinyl, trifluoromethylsulfonyl, pentafluoropropionamido, or 3-methylureido; and R.sub.1 is hydrogen, alkyl, chlorine or trifluoromethyl; which comprises the steps of heating an N-alkenyl haloacyl amide in the presence of a catalytic amount of ferrous ion and recovery of the resulting product.

REFERENCES:
patent: 3488732 (1970-01-01), Heiba et al.
patent: 4119636 (1978-10-01), Teach
Smith et al, J. Amer. Chem. Soc. 62, 778 (1940).

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