88521-60-2Relevant academic research and scientific papers
A NOVEL SYNTHESIS OF CYCLOHEPTADIBENZOXAZINES AND 14HBENZOXAZINOCYCLOHEPTABENZOXAZINES
Nozoe, Tetsuo,Okai, Harue,Wakabayashi, Hidetsugu,Ishikawa, Sumio
, p. 1145 - 1148 (2007/10/02)
The title compounds, namely, the chiral acetals and their positional isomers were efficiently prepared by heating 6-bromocycloheptabenzoxazines and the substituted o-aminophenols at 120 deg C in acetic acid.
Reactive Troponoids and o-Aminophenol. V. The Reaction of 3-Bromo-2-methoxytropone and o-Aminophenol
Someya, Taichi,Okai, Harue,Wakabayashi, Hidetsugu,Nozoe, Tetsuo
, p. 2756 - 2761 (2007/10/02)
The reaction products of the title substances in hot acetic acid were separated by preparative TLC into compounds A-L according to the Rf-values, and the structural assignments for these products were now made as follows: A, 14H-benzoxazinocycloheptabenzoxazine; B, 1-formylphenoxazine; F, cycloheptadibenzoxazine; G, cycloheptabenzoxazin-10(11H)-one or its enolic form; J, cycloheptabenzoxazin-6(11H)-one; L, 6-(o-hydroxyanilino)cycloheptabenzoxazine hydrobromide. A small amount of 2-methylamino-3H-phenoxazin-3-one was also produced. Possible reaction pathways for the formation of these products are also discussed.
