1,3-<i>bis</i>(2'-Hydroxybenzyl)imidazolidines as Novel Precursors of 3,3′-Ethylene-<i>bis</i>(3,4-dihydro-2H-1,3-benzoxazine)

Abstract

Abstract A one-step synthesis of 3,3′-ethylene-bis(3,4-dihydro-6-substituted-2H-1,3-benzoxazines) (2a-e) from 1,3-bis(2′-hydroxy-5′-substituted-benzyl)imidazolidines (1a-e) and formaldehyde is reported.