A NEW RING TRANSFORMATION OF ISOXAZOLO[3,4-<i>d</i>]PYRIMIDINES INTO PYRIMIDO[4,5-<i>d</i>]PYRIMIDINES
作者:Fumio Yoneda、Tetsumi Yano、Masatsugu Higuchi、Akira Koshiro
DOI:10.1246/cl.1979.155
日期:1979.2.5
The treatment of isoxazolo[3,4-d]pyrimidines with benzylamines and 4-picolylamine caused ring expansion to the respective pyrimido-[4,5-d]pyrimidines by intramolecular cycloaddition of 1,5-diazahexatriene intermediates. Reaction mechanism of this ring transformation will be discussed.
用苄胺和 4-吡啶甲胺处理异恶唑并 [3,4-d] 嘧啶,通过 1,5-二氮杂六三烯中间体的分子内环加成反应,导致相应的嘧啶并 [4,5-d] 嘧啶扩环。将讨论这种环转化的反应机理。