Process for preparing aromatic methylene-dioxy compounds

Details Process for preparing aromatic methylene-dioxy compounds Process for preparing aromatic methylene-dioxy compounds

1977-01-31

1980-01-15

Love, Ethel G.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D31744

Patent

active

041838610

ABSTRACT:
A method for preparing aromatic methylenedioxybenzene products which are optionally substituted in the aromatic ring by alkyl, aldehydo, carboxy, alkoxy, halo or nitro moieties; which comprises treating the corresponding dihydroxybenzene with methylene chloride in the presence of a catalyst selected from among ammonium, phosphonium or arsonium chlorides and bromides. The reaction is conducted in the aqueous phase in the presence of a suitable base, such as a sodium derivative to form a sodium salt of the dihydroxybenzene reactant.
The aromatic methylenedioxy products of this invention are known compounds which are used in the chemical, pharmaceutical and cosmetic industries and they have utility as intermediates in the preparation of other known compounds.

REFERENCES:
patent: 3726924 (1973-04-01), Leimgruber et al.
patent: 3838051 (1974-09-01), Andress

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