1.4- Diaminobenzene, basicity

A decrease in the basic properties of the reagent in going from 1,2-diaminoethane to 1,2-diaminobenzene leads, in the case of ynaminoketones (X = Me), to the 1,3-orientation of binucleophile and the formation of the benzodiazepines 356, suggesting that the carbonyl group is also involved in the heterocyclization. 

Diazo Components With Two Different Cationic Residues. Mono- and disazo dyes have been prepared in which the diazo compound carries at least two different basic and/or cationic groups.Reaction of 2,4- or 2,5-diaminobenzene sulfonic acids with 2-chloro-l,3,5-triazines that are substituted in positions 4 and 6 by aminoalk-ylamines and cyclic ammonium alkylamines, respectively, leads to diazo compo-... 

Monodithiocarbamates can be prepared from phenylene diamines in the presence of a second, more basic amine. For example, addition of carbon disulfide and NEta to 1,2-diaminobenzene affords the yellow triethylammonium dithiocarbamate salt in high yield (115). The latter can then be reacted with various a-halogenated carbonyl derivatives resulting in cyclization and dehydration to give the new amines. These in turn react with carbon disulfide and... 

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