4-(2,5-Dihydroxyphen-1-yl)-crotonic acid and its derivatives, an

Details 4-(2,5-Dihydroxyphen-1-yl)-crotonic acid and its derivatives, an 4-(2,5-Dihydroxyphen-1-yl)-crotonic acid and its derivatives, an

1981-02-26

1982-10-12

Trousof, Natalie

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

560 55, 560 75, 560144, 562465, 562478, C07C 6928, C07C 69734, C07C 5964

Patent

active

043538363

ABSTRACT:
4-(2,5-Dihydroxyphen-1-yl)-crotonic acid and its derivative (I) ##STR1## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each H or C.sub.1 -C.sub.8 -alkyl, R.sup.5 is H, C.sub.1 -C.sub.30 -alkyl or C.sub.2 -C.sub.30 -alkenyl, and R' is H or an organic radical which can be split off hydrogenolytically, and a process for the preparation of the compounds I, wherein a hydroquinone II ##STR2## is reacted, in the presence of from 0.1 to 2 moles of a Lewis acid per mole of II, with

REFERENCES:
patent: 3825584 (1974-07-01), Morimoto et al.
patent: 3947473 (1976-03-01), Scott et al.
patent: 4139545 (1979-02-01), Morimoto et al.

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