Synthesis of a novel benzoxazine containing benzoxazole structure

A high-purity benzoxazine (Boz-BOA) containing benzoxazole structure was successfully synthesized by three-step synthetic method using 2-(4-aminophenyl)-1H-benzoxazole-5-amine (BOA) and ortho-hydroxybenzaldehyde. The structure of Boz-BOA was confirmed by FTIR and 1H NMR spectra. The DSC was utilized to probe the curing behavior of Boz-BOA and exhibited a narrow melting peak and curing exothermic peak.