作者:K. Rajendra Prasad、Malleshwar Darbarwar
DOI:10.1080/00397919208020491
日期:1992.6
Hitherto unknown 3-(2H-Indazol-2-yl)-2H[l]benzopyran-2-ones (4a-f) have been synthesized under the triethyl phosphite (TEP) mediated reaction conditions of 3-[[(2-nitrophenyl)-methylene] amino]-2H-1-benzopyran-2-ones (3a-f), obtained by the condensation of 3-amino coumarins (la-f) with 2-nitrobenzaldehyde (2).