Citation: Cherkupally Sanjeeva Reddy, Mekala Raghu. Synthesis of some new N,N'-diaryisubstituted methylene-bis-dihydro-2H-1,3-benzoxazines[J]. Chinese Chemical Letters, ;2008, 19(12): 1407-1410. doi: 10.1016/j.cclet.2008.07.001 shu

Synthesis of some new N,N'-diaryisubstituted methylene-bis-dihydro-2H-1,3-benzoxazines

Department of Chemistry, Kakatiya University, Warangal 506009, India

Received Date: 2 June 2008

Fund Project: The authors are grateful to the Director, IICT, Hyderabad, India, for providing the spectral data.

The synthesis of a new series of six-membered N,N'-diarylsubstituted methylene-bis-dihydro-2H-1,3-benzoxazines (5a-e) was achieved in excellent yields by Mannich-type condensation of N,N'-diarylsubstituted methylene-bis-o-hydroxybenzyl amines (4a-e) with formaldehyde in chloroform at reflux. These amines (4a-e) were obtained by the reduction of N,N'-diarylsubstituted methylene-bis-o-hydroxybenzyl imines (3a-e) with NaBH₄, which inturn were obtained by the condensation of methylene-bis-salicylaldehyde (2) with various substituted arylamines.
- Methylene-bis-salicylaldehyde,
- Mannich-type condensation,
- Methylene-bis-1,
- 3-benzoxazines
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