Method of preparing phthalide

Details Method of preparing phthalide Method of preparing phthalide

1978-05-02

1979-12-11

Rotman, Alan L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D30788

Patent

active

041782950

ABSTRACT:
An improvement in a process for preparing phthalide by reacting chlorophthalide with hydrogen in the presence of a catalyst at a temperature between 50.degree. and 350.degree. C., the improvement residing in carrying out the process in the absence of a hydrogen chloride acceptor, flowing the chlorophthalide continuously in fluid form through a solid catalyst bed in a reactor, passing the hydrogen through in such an excess so as to sweep off the hydrogen chloride formed and withdrawing phthalide in fluid form.

REFERENCES:
patent: 4113741 (1978-09-01), Funten et al.
patent: 4116976 (1978-09-01), Englaender et al.

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