Substituted .beta.-anilino-.gamma.-methoxy-crotonates

Details Substituted .beta.-anilino-.gamma.-methoxy-crotonates Substituted .beta.-anilino-.gamma.-methoxy-crotonates

1980-07-23

1981-12-01

Breitenstein, G. T.

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

Organic compounds

Carboxylic acid esters

560 22, 560 51, 560 53, 560174, 560 21, 544250, C07C101453

Patent

active

043037950

ABSTRACT:
A process is provided for preparing pyrazolo-[1,5-c]quinazoline derivatives of the structure ##STR1## wherein X is O or S; R.sup.1 is hydrogen, lower alkyl, hydroxymethyl, phenyl-lower alkyl, phenyl or phenyl substituted with halogen, lower alkyl, lower alkoxy, or trifluoromethyl; R.sup.2 is lower alkoxy, phenyl-lower alkoxy, phenoxy, or phenoxy substituted with lower alkyl or lower alkoxy; and R.sup.3 and R.sup.4 are the same or different and are selected from the group consisting of hydrogen, alkyl of 1 to 4 carbons, alkoxy of 1 to 4 carbons, lower alkanoyloxy of 1 to 4 carbons, nitro, benzyloxy, benzyloxy having a single mono-lower alkoxy substituent, halogen, hydroxy, and trifluoromethyl, wherein quinolone compounds of the structure ##STR2## which are new intermediates, are reacted with a hydrazine compound to form a 5-(2-aminophenyl)-pyrazole which is then cyclized to the product.
In addition, the above product may be reacted with a halogen acid to form the corresponding hydroxymethyl compound.

REFERENCES:
patent: 4027037 (1977-05-01), Siegle
Sugiyana, Chem. Absts., 86, 89811(m), 1977.

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