RING-SUBSTITUTED DERIVATIVES OF PYROGALLOL

摘要

Pyrogallol derivatives of general formula: wherein R1 and R2 may be the same or different and represent hydrogen or lower alkyl, R represents hydrogen or a group in the case where R represents hydrogen, each of X, Y and Z represent hydrogen, halogen or nitro, with the proviso that not all of X, Y and Z are simultaneously hydrogen and with the further proviso that, when R1, R2, X and Z are hydrogen then Y cannot be nitro, and with the further proviso that, when R1, R2, Y and Z are hydrogen, then X cannot be a bromine atom; in the case where R represents a group R3 and R4 may be the same or different and represent hydrogen or lower alkyl; X, Y and Z may be the same or different and represent hydrogen, halogen or nitro; n is an integer from 0 - 2 inclusive; and R5 represents hydrogen, oxiranyl, mono- or dihydroxyalkyl, N-(dihydroxy-alkyl)-amino-hydroxyalkyl, carboxy, carbalkoxy, carbamyl, N-alkylcarbamyl, N,N-dialkylcarbamyl, cyano, .DELTA.2imidazolin-2-yl, amidoxime, oxime ester or dialkyl acetal, the amino radical of the carbamyl groups being also a saturated hetero-ring having in total two hetero atoms; and their salts with inorganic or organic acids and bases, with the proviso that R1 to R5 and Z cannot be simultaneously hydrogen when X and Y are chlorine atoms, and with the further proviso, that R1 to R5 cannot be hydrogen simultaneously; are useful as agricultural chemicals or intermediates for such and have activity against Botrytis, Plasmopara viticola and Alternaria.