Process for preparing 1,3-dialkyl-5-hydroxyoxindoles and the eth

Details Process for preparing 1,3-dialkyl-5-hydroxyoxindoles and the eth Process for preparing 1,3-dialkyl-5-hydroxyoxindoles and the eth

1995-05-23

1997-03-25

Haley, Jacqueline

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D20934

Patent

active

056146370

ABSTRACT:
The invention is directed to a process for preparing a 1,3-dialkyl-5-hydroxyoxindole of formula 1: ##STR1## comprising heating an N-alkyl-p-alkoxy-(.alpha.-haloacyl)anilide of formula 2: ##STR2## wherein the substituents are as defined herein, in the presence of an anhydrous zinc halide to a temperature in the range from about 120.degree. C. to about 160.degree. C., and isolating the 1,3-dialkyl-5-hydroxyoxindole prepared.

REFERENCES:
patent: 4791107 (1988-12-01), Hamer et al.
March, J. Advanced Organic Chemistry, New York, John Wiley and Sons, 1985, pp. 479-480.
Julian, P.L. et al., J. American Chemical Society, 57, 1935, pp. 563-566.

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