Five-Membered 2,3-Dioxoheterocycles: XCIV.* Recyclization of 4,5-Diaroyl-1H-pyrrole-2,3-diones under the Action of 3-Aminopyrazolo[3,4-b]pyridine. Crystal and Molecular Structure of Substituted Pyrido[2',3':3,4]pyrazolo[1,5-a]pyrimidine

摘要

1-Aryl-4,5-diaroyl-1H-pyrrole-2,3-diones react with 3-amino-4,6-dimetriyl-2H-pyrazolo[3,4-b]-pyridine affording N-aryl-2,3-diaroyl-8,10-dimethylpyrido[2',3':3,4]pyrazolo[1,5-a]pyrimidine-4-carboxamides.