Modified coumarins. 26. Synthesis of angular dihydrooxazinocoumarins from 3-hydroxy[b,d]pyran-6-one
作者:I. V. Nagorichna、M. M. Garazd、Ya. L. Garazd、V. P. Khilya
DOI:10.1007/s10600-007-0054-9
日期:2007.1
N-Substituted angular pyranodihydrobenzoxazines were prepared by condensation of 3-hydroxy-dibenzo[b,d]pyran-6-one with various primary amines and two equivalents of formaldehyde in the presence of 4-N,N-dimethylaminopyridine as base.