Preparation of substituted benzophenones

Details Preparation of substituted benzophenones Preparation of substituted benzophenones

1986-12-22

1988-01-26

Reamer, James H.

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

Organic compounds

Oxygen containing

568356, C07C 4565

Patent

active

047218150

ABSTRACT:
There is disclosed a process for the preparation of a benzophenone, which process comprises contacting a feed comprising a 3-cyclohexene carboxylic acid in the vapor phase and under suitable conditions with a ketonic decarboxylative coupling catalyst to convert said carboxylic acid into a bis (3-cyclohexene) ketone and contacting said bis (3-cyclohexene) ketone with a dehydrogenation catalyst to dehydrogenate said bis (3-cyclohexene) ketone to provide said benzophenone. Suitably, the coupling catalyst comprises an oxide of manganese. A Group VIII metal-containing catalyst is a typical dehydrogenation catalyst.

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patent: 3409690 (1968-11-01), Fishel
patent: 3856820 (1974-12-01), Hayes
patent: 4104317 (1978-08-01), Antos
patent: 4271327 (1981-06-01), Ishikawa et al.

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