Functional 1,3-benzoxazine bearing 4-pyridyl group: Synthesis and thermally induced polymerization behavior
作者:Asei William Kawaguchi、Atsushi Sudo、Takeshi Endo
DOI:10.1002/pola.27015
日期:2014.2.1
3‐benzoxazine 1, bearing 4‐pyridyl moiety on the nitrogen atom, was synthesized from p‐cresol, 4‐aminopyridine, and paraformaldehyde. The efficient synthesis was achieved by adding acetic acid to suppress the strong basicity caused by the presence of 4‐aminopyridine derivatives. Upon heating 1 at 180 °C, it underwent the thermally induced ring‐opening polymerization. The resulting polymer was composed
由对甲酚,4-氨基吡啶和多聚甲醛合成了在氮原子上带有4-吡啶基部分的1,3-苯并恶嗪1。通过添加乙酸来抑制由4-氨基吡啶衍生物的存在引起的强碱性,可以实现有效的合成。在180°C下加热1时,它进行了热诱导的开环聚合反应。所得的聚合物由两种类型的重复单元组成,即(1)曼尼希类型的一种(单元-苯酚-CH 2 -NR-CH 2-),这是常规苯并恶嗪的一般开环聚合反应所期望的,和( 2)一种典型的酚醛树脂类型(‐phenol‐CH 24-氨基吡啶和多聚甲醛(B单元)的释放引起的苯酚)。聚合物的另一个结构特征是它在链端具有苯并恶嗪部分。©2013 Wiley Periodicals,Inc. J. Polym。科学,A部分:Polym。化学 2014,52,410-416