Meso-ionic didehydro derivatives of 1,7-dehydro-1-substituted-3H

Details Meso-ionic didehydro derivatives of 1,7-dehydro-1-substituted-3H Meso-ionic didehydro derivatives of 1,7-dehydro-1-substituted-3H

1977-09-13

1978-11-07

Daus, Donald G.

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

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

544263, 424251, A61K 31505, C07D48714

Patent

active

041247647

ABSTRACT:
New 1,7-dihydro-1-substituted-3H-pyrazolo[4,3-e]-1,2,4-triazolo[4,3-c]pyrimidi ne-3-thione and 3-one mesoionic didehydro derivatives which have the formula ##STR1## wherein R.sub.1 is hydrogen, lower alkyl, phenyl-lower alkyl, cycloalkyl or hydroxy-lower alkyl;

REFERENCES:
patent: 3850932 (1974-11-01), Kathawala
patent: 4020083 (1977-04-01), Kathawala
patent: 4026893 (1977-05-01), Denzel et al.
patent: 8787430 (1974-01-01), Hoehen et al.
Reimlinger, et al., "Chem. Ber.", vol. 103 (1970), pp. 1960-1981.
Sihdu et al., "Die Naturwissenschaften", vol. 732 (1963).
"Derwent Patent Abstracts", 77971T-BE(1973).

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