Process for the preparation of salts of 4-hydroxystyrene

Details Process for the preparation of salts of 4-hydroxystyrene Process for the preparation of salts of 4-hydroxystyrene

1993-06-22

1994-04-19

Lone, Werren B.

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

Organic compounds

Oxygen containing

558270, 568716, C07C 3920, C07C 6996

Patent

active

053046900

ABSTRACT:
4-Acetoxystyrene is reacted with a base in a solvent to form a salt of 4-hydroxystyrene via saponification. Alternatively, 4-hydroxystyrene is reacted with a base to form a salt of 4-hydroxystyrene. In the latter case, the 4-hydroxystyrene is prepared by the transesterification of 4-acetoxystyrene. Subsequently or simultaneously, the salt of 4-hydroxystyrene is reacted, preferably in situ, with di-tertiary-butyl-dicarbonate to form 4-tertiarybutoxycarbonyloxystyrene.

REFERENCES:
patent: 4491628 (1985-01-01), Ito et al.
patent: 5082965 (1992-01-01), Nader et al.
patent: 5087772 (1992-02-01), Sheehan et al.
patent: 5241098 (1993-08-01), Kvakovszky et al.
patent: 5256809 (1993-10-01), Kvakovszky et al.

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