The Reactions of Diaminomaleonitrile with Isocyanates and Either Aldehydes or Ketones Revisited
作者:Brian L. Booth、Alice M. Dias、M. Fernanda Proença、Magdi E. A. Zaki
DOI:10.1021/jo010595w
日期:2001.12.1
urea derivatives of diaminomaleonitrile 2 with aldehydes or ketones in the presence of triethylamine has established that the products of these reactions are not pyrimidino[5,4-d]pyrimidines 9 as previously reported, but 8-oxo-6-carboxamido-1,2-dihydropurines 12, which are oxidized rapidly in air to the corresponding 6-carboxamidopurines 13. Similarly, the reaction of Schiff base derivatives of DAMN
The reaction of the Schiff bases of benzamidrazone or diaminomaleonitrile with bis(dimethylamino)chlorophosphine or tris(dimethylamino)phosphine affords new 1H, 2H-, or 4H-1,2,4,3λ3-triazaphospholes or 1,3,2λ3-diazaphospholes with the formation of triaza- or diaza-phosphorines as intermediates.