Using a Diamide Oxamide , Amido Nitrile, or Related Synthon

Using a Diamide (Oxamide), Amido Nitrile, or Related Synthon [Pg.40]

This is a very neglected category of cyclocondensation. However, the following examples indicate its potential utility. [Pg.40]

3-Diaminocyclohexane (285) and A, A -di-p-tolyldithiooxamide (286) gave 3-p-toluidino-4a,5,6,7,8,8a-hexahydro-2(lH)-quinoxalinethione (287) (MeaSO, 40°C, h 72% it is interesting that the two thioamide entitites reacted in different ways). [Pg.40]

2-Benzenediamine (288) and the unstable oxamide equivalent (289), prepared in situ by chlorination of bis(dimethylamino)acetylene, gave 2,3-bis(dimethyl amino)quinoxaline (290) (no details). [Pg.40]

2-Benzenediamine (291) and C-cyanoformanilide (292) gave 3-anilino-2-quinoxalinamine (293) (probably EtOH, reflux, 3 h 70%). ° [Pg.40]

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