Tetrahedron Letters p. 4473 - 4476 (1991)
Update date:2022-08-04
Topics:
Wamhoff, Heinrich
Schmidt, Andreas
Nieger, Martin
1,3-Dimethyl-6(triphenylphosphoranylideneamino)uracil 1 affords with pyridines and the isocyanates 2a-f in a novel type of a three component reaction pyrido[1,2-f]pyrimido-[4,5-d] pyrimidines 5a-h (X-ray analysis of 5a).
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(1991)