Azo compounds containing phosphorus, their preparation, and their use as pesticides, as light sensitive materials and as starting materials for the synthesis of pyrazolones

摘要

Azo cpds. of formula D-N:N-C(P(O)R4R5)(COOR2)-CH2-COOR1 (I) are new (D is the residue of a diazo component; R1 and R2 are opt.substd. alkyl, aryl, alkenyl, cycloalkyl, aralkyl or heteroaralkyl; R3 is OR1 or NR1R2; R4 is R1 or R3). Pref. R1 and R2 are methyl or ethyl; R3 and R4 are OR1; and D is Y1,Y2-phenyl, where Y1 is H, chloro or methyl, and Y2 is nitro, sulphonic acid or as Y1.. Cpds. (I) are light-sensitive materials useful in copying processes since they are cleaved by UV or sunlight and the cleavage prods. can be coupled to other couplers giving dyes of different colours. (I) are also pesticides, esp. insecticides, acaricides and nematocides, and intermediates (by hydrolysis with base, esp. in a 'one-pot' reaction) for pyrazolones useful as azo dye couplers and as photographic developers.