| 摘要 |
<p>Cpds. are of formula: (where R is H, halogen, haloalkyl, CN, COOH, alkoxy, OH, NH2, N(Alk)2, Alkyl, NO2 NHAlk, NHAcyl, SH, SAlk, SOAlk, SO2Alk2 Alk(NH)-alk, AlkOalk, COOAlk, aralkoxy or acyl, n =1-4, R1 and R2 are H or alkyl, Z is a heterocyclic or homocyclic opt. substd. ring system contng. less than 3 rings, X is CO or COCH:CH, and Y is a polar group contng. an acid proton of pKa 2-6 esp a phosphonic acid, ester or amide a sulphonic acid or ester, a sulphinic acid or sulphonamido group) as well as their salts, esters, anhydrides and amides.</p> |
