Process for preparing 3,3-thiobis (2-methoxy-1-azabenzanthrone
AssigneeMontedison S.p.A.
InventorGiuseppe Ribaldone
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Abstract
A new process for preparing 3,3 - thio - bis[2-Methoxy-1-azabenzanthrone], a useful intermediate in the synthesis of dyestuffs, is disclosed. The process involves reacting 2-methoxy-1-azabenzanthrone with sulfur chlorides in suspension or solution in an inert solvent under heating, and recovering the reaction product from the reaction mass, e.g., by filtering.
Claims8
A process for preparing 3,3-thiobis [2-methoxy-1-azabenzanthrone], comprising reacting 2-methoxy-1-azabenzanthrone with sulfur chlorides in inert solvents selected from the group consisting of chlorinated saturated aliphatic hydrocarbons C.sub.1 - C.sub.2, dimethylformamide and nitrobenzene, at a temperature of from 40.degree.to 100.degree.C.
Dependencies are inferred from the claim text.