A method for the synthesis of methyl and ethyl 2-R-1-4-R-2-5-oxo-5,8-dihydropyrido[2,3-d]pyrimidine-7-carboxylates was proposed. The method is based on condensation of 2-R-1-6-R-2-5-acetyl-4-aminopyrimidines with ethyl oxalate in the presence of MeONa or EtONa. Products of the Friedlander self-condensation of the starting pyrimidines were also obtained.
Harris, Roger L. N., Australian Journal of Chemistry, 1981, vol. 34, # 3, p. 623 - 634
作者:Harris, Roger L. N.
DOI:——
日期:——
Preparation and Reactions of N-Cyanoamidines
作者:K. Robert Huffman、Fred C. Schaefer
DOI:10.1021/jo01042a017
日期:1963.7
Neuartige Sulfimide
作者:Elisabeth Kohrt、Klaus Hartke
DOI:10.1002/ardp.19933260504
日期:——
AbstractDie Succinimido‐sulfoniumchloride 2 kondensieren mit Cyanamid (3) unter Triethylamin‐Katalyse zu den N‐Cyanosulfimiden 4. In analoger Weise erhält man aus 2 und den 2‐(1‐Aminoalkyliden)malondinitrilen 5 die Sulfimide 6 sowie aus 2 und den N‐Cyanamidinen 7 die Sulfimide 8.
HARRIS R. L. N., AUSTRAL. J. CHEM., 1981, 34, NO 3, 623-634