Concise synthesis and characterization of unsymmetric 1,3-benzoxazines by tandem reactions

IMRAN M., Kışkan B., Yagci Y.

TETRAHEDRON LETTERS, vol.54, no.36, pp.4966-4969, 2013 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 54 Issue: 36
  • Publication Date: 2013
  • Doi Number: 10.1016/j.tetlet.2013.07.041
  • Journal Name: TETRAHEDRON LETTERS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.4966-4969
  • Istanbul Technical University Affiliated: Yes

Abstract

A new synthetic protocol for the preparation of unsymmetric 1,3-bisbenzoxazines using the combination of three-step synthesis and classical one-step benzoxazine synthesis strategies is described. For this purpose, 4-hydroxyphenylaminomethyl phenol (HPAMP) is synthesized as the intermediate and reacted with two different aliphatic amines to yield the desired unsymmetric bisbenzoxazines. The structures of the intermediates and products are confirmed by FT-IR and H-1 NMR spectral analysis. Curing behaviors of the bisbenzoxazines are studied by differential scanning calorimetiy (DSC). (C) 2013 Elsevier Ltd. All rights reserved.