Vr. Rao et al., SYNTHESIS OF DROXY-3-[(4-METHYL-2-OXO-2H-1-BENZOPYRAN-7-YL-OXY) METHYL]-8-UNDECYL-6H-4, 1,2-BENZOXADIAZIN-6-ONE, Indian Journal of Heterocyclic Chemistry, 5(3), 1996, pp. 227-228
Embelin (I) was condensed with 4-methyl-7-coumarinyloxyacetic acid hyd
razide (II) in abs ethanol to give hydroxy-3-[(4-methyl-2-oxo-1-2H-1-b
enzopyran-7-yl) oxymethyl]-8-undecyl-6H-4, 1,2-benzoxadiazin-6-one. (I
II). which on further condesetion with aromatic primary amines, acid h
ydrazides and orthophenylenediamines gave Schiff's bases (IV) and oxad
iazinophenazines (V).