83026-12-4Relevant articles and documents
Benzodifurantrione compounds and process
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, (2008/06/13)
Benzodifurantriones of Formula (1): STR1 in which W is unsubstituted or substituted aryl, a process for their preparation via dioxo intermediates and processes for their conversion into benzodifuranone dyes and compounds of Formula (7): STR2 are provided wherein R3 is --H, --COR2, --SO2 R2 -- which R2 is alkyl, cycloalkyl, aryl or aralkyl and R4 is --COOR2, --CONRR1 in which R and R1 each independently is --H, alkyl, cycloalkyl, aryl or aralkyl; --COOH or the alkali metal, alkaline earth metal or ammonium salts thereof; or --COX2 -- which X2 is halo.