Synthesis of N-[3-(dimethylamino)-2-(substituted thio)-2-propenylidene]-N-methylmethanaminium salts via 2-(alkylthio)- and 2-(arylthio)-3-(dimethylamino)acroleins
Synthesis of N-[3-(dimethylamino)-2-(substituted thio)-2-propenylidene]-N-methylmethanaminium salts via 2-(alkylthio)- and 2-(arylthio)-3-(dimethylamino)acroleins