| abstract |
Cpds. of formula (I) are new. In (I), R4 i H, halo or NO2; R6 is H or 1-6C alkyl; R7 is Cl or OH; and Z is I (when R7 is Cl), phenyl (opt. substd. by one or more halo; 1-4C alkyl or alkoxy; CF3; formyl; CH2OR; CH2OCOR; CH2CONRR'; CHONCOR; COOR; NO2; NHR; NRR' or NHCOR), heterocycle such as pyridinyl, thienyl, furyl, thiazolyl and pyrimidyl (opt. substd. as above) or 5-8C cycloalkyl when R7 is Cl or OH (free or as an alkali metal or tert. amine salt); and R and R' are H or 1-7C alkyl. |