Process for the preparation of 5-hydroxydiprafenone and its acid

Details Process for the preparation of 5-hydroxydiprafenone and its acid Process for the preparation of 5-hydroxydiprafenone and its acid

1988-03-04

1992-06-09

Raymond, Richard L.

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

Organic compounds

Amino nitrogen containing

549517, 564347, 568331, C07C20968, C07C21754

Patent

active

051208741

ABSTRACT:
A process for the preparation of 5-hydroxydiprafenone and its acid addition salts by catalytic removal of the benzyl group of the corresponding 5-benzyloxy compound is described.

REFERENCES:
patent: 3501769 (1970-05-01), Crowther et al.
patent: 3674840 (1972-07-01), Grandstrom et al.
patent: 3929834 (1975-12-01), Nagata
patent: 4018824 (1977-04-01), Tsukamoto et al.
patent: 4283434 (1981-08-01), DuBois et al.
patent: 4336267 (1982-06-01), Carlsson et al.
patent: 4540697 (1985-09-01), Franke et al.
patent: 4571409 (1986-02-01), Franke et al.
Monecke et al., "Chemical Abstracts", vol. 68, p. 6718, Section 69421; (1968) Specifically lines 23-25 from the top.

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