PROCESS FOR PREPARING 3,3'-THIOBIS (2-METHOXY-1-AZABENZANTHRONE)

摘要

ABSTRACT OF THE DISCLOSUREA new process for preparing 3,3 - thio - bis [2-me-thoxy-1-azabenzathrone], a useful intermediate in the syn-thesis of dyestuffs, is disclosed. The process involvesreacting 2-methoxy-1-azabenzanthrone with sulfur chlorides insuspension or solution in an inert solvent under heating, andrecovering the reaction product from the reaction mass, e.g.,by filtering.