SYNTHESIS OF PYRAZOLO [3',4':4,5] PYRIMIDO [2,3-c][1,4] BENZOXAZINES: A NEW HETEROCYCLIC RING SYSTEM
作者:P.S.N. Reddy、Pragati Reddy
DOI:10.1515/hc.2003.9.5.503
日期:2003.1
A series of 4-oxo-pyrazolo[3\4':4,5]pyrimido[2,3-c][l,4]benzoxazines(4a-l) have been prepared by cyclocondensation of 1,4-benzoxazinones (1) and with 5aminopyrazole-4-carboxylic acids(3a-c) in a single step.