Halo-containing 3-methylflavone-8-carboxylic acid derivatives

Details Halo-containing 3-methylflavone-8-carboxylic acid derivatives Halo-containing 3-methylflavone-8-carboxylic acid derivatives

1985-04-04

1987-01-06

Ramsuer, Robert W.

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

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

544376, 546196, 548525, 549403, C07D30932, C07D40512, C07D41312

Patent

active

046347682

ABSTRACT:
This invention relates to derivatives of 3-methylflavone-8-carboxylic acid represented by the formula (1) ##STR1## wherein R represents a hydrogen atom, a lower alkyl group or a group ##STR2## (wherein R.sup.1 and R.sup.2 represent a lower alkyl group or R.sup.1 and R.sup.2, when taken together with the nitrogen atom to which they are attached, may form a heterocyclic ring with or without an intervening hetero atom, and n is an integer of 1 to 4), and X represents a halogen atom, which are useful as intermediates.
This invention also relates to processes for preparing the same.

REFERENCES:
patent: 2921070 (1960-01-01), da Re
patent: 3429896 (1969-02-01), Bossert et al.
patent: 4115567 (1978-09-01), Doria et al.
Pendse et al., Chemical Abstracts, vol. 51, 5061-5062 (1957).
Takahashi et al., J. Pharm. Soc. Japan, vol. 74, pp. 48-51 (1954).
Takahashi et al., Chemical Abstracts, vol. 49, 1623.
Organic Syntheses, pp. 543-545.

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