4-thioxo-benzopyrano[2,3-d]pyrimidine derivatives

Details 4-thioxo-benzopyrano[2,3-d]pyrimidine derivatives 4-thioxo-benzopyrano[2,3-d]pyrimidine derivatives

1984-09-24

1986-04-22

Daus, Donald G.

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

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

544115, 544250, C07D491052, C07D491153

Patent

active

045843740

ABSTRACT:
4-Thioxobenzopyrano[2,3-d]-pyrimidine derivatives of the general formulae Ia or Ib ##STR1## are described. Compounds Ia and Ib are tautomers and are valuable intermediates for the preparation of 5H-[1]-benzopyrano[2,3-d]pyrimidine derivatives having ulcer-protective action without inhibition of secretion.

REFERENCES:
patent: 3272811 (1966-09-01), Ohnacker et al.
patent: 3468888 (1969-09-01), Chow
patent: 3578666 (1971-05-01), Manning
patent: 3772230 (1973-11-01), Hardtmann
patent: 4272535 (1981-09-01), Blythin
patent: 4297355 (1981-10-01), Blythin
O'Callaghan, Chemical Abstracts, vol. 93, 220682j (1980).
O'Callaghan et al., Chemical Abstracts, vol. 100, 103286k (1984).

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