Benzopyran derivatives

Details Benzopyran derivatives Benzopyran derivatives

1993-08-18

1995-01-24

Chan, Nicky

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549407, C07D31192, C07D31104

Patent

active

053844149

ABSTRACT:
Benzopyran derivatives of the formula: ##STR1## wherein R.sup.1a is hydrogen, C1-4 alkyl or C1-4 alkoxy; or two R.sup.1a taken together with 7th- and 8th-carbon to which they are attached form a C6 carbocyclic ring;

REFERENCES:
patent: 4728650 (1988-03-01), Eziri et al.
Derwent Patent Abstract: 87-246978/35--Jan. 23, 1986.

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