| abstract |
The present application is a compound of formula (1):n n n n n n n n Wherein R is -H or alkyl, R 1 , R 2 and R 3 are each independently -H or alkyl, X is halogen, -SO 3 , -CN, -C0 2 alkyl, -CO 2 alkylaryl, -C0 2 aryl, -CO 2 H or aryl, and Y is -H, alkyl, alkoxy, allyl or halogen.n n n And methods for their preparation.n n n It is useful as an intermediate in the preparation of the pigments, pharmaceuticals and pesticides of formula (1). |