W. Zielinski et M. Mazik, SYNTHESES OF 2,4-DIAMINOPYRIMIDINES AND 1-AMINOISOQUINOLINES IN THE REACTIONS OF ALKYL AND BENZYL KETONES WITH CYANAMIDE AND N,N-DIMETHYLCYANAMIDE, Heterocycles, 38(2), 1994, pp. 375-382
The reaction of alkyl and benzyl ketones with cyanamide and N,N-dimeth
ylcyanamide in the presence of POCl3 was examined. At the first stage,
chloroformamidine derivatives were formed. In the presence of TiCl4,
they underwent further reactions to the derivatives of 1-aminoisoquino
line and 2,4-diaminopyrimidine. The effect of a constitution of substr
ates on adequate ratios of heterocyclic compounds is discussed.