| 摘要 |
<p>Title cpds. of formula: (where X is halogen or CF3; Y1 and Y2 are H, alkyl or acyl; R is H, alkyl, aryl or aralkyl; R1 and R2 are H, alkyl opt. substd. by halogen, OH, alkoxy, thio, alkylthio, haloalkylthio, or arylthio, cycloalkyl, cycloalkyl-alkyl, aryl or -aralkyl, or R1 and R2 together with C to which they are linked, form a cycloalkyl or heterocyclic gp.f n is 0 or 1-4 and R3, R4 and R5 are H, alkyl, alkoxy, OH, halogen, CF3, -SO2NH2 or amino), or their salts are prepd. from 5-halo-2-alkylanilines by reaction with alkylhaloformate, conversion of N-carbalkoxyaniline obtained to 5-halo-2-alkyl-4-sulphamylaniline, oxidation, ring-closure and condensation, and conversion to a benzamide which is then reacted with an acetal, aldehyde or ketone R1R2C(OR1)2, R1CHO or R1R2CO.</p> |
