Keteneおよびその誘導体の研究(第59報)5-Acetyl-2,6-dimethyl-4(3H)-pyrimidoneの閉環反応

抄録

Synthesis of 2, 6, 8-trimethylpurine (VIII) and 2, 5, 7-trimethyloxazolo[5, 4-α]pyrimidine (IV) from 5-acetyl-2, 6-dimethyl-4(3H)-pyrimidone (I) in three steps involving Bechmann rearrangement was carried out. Also, 3, 4, 6-trimethyl-1H-pyrazolo[3, 4-d]pyrimidine (IX) and 2, 4, 5, 7-tetramthylpyrimido[4, 5-d]pyrimidine (X) were prepared from I.