Use of NMR and Mass Spectrometry in Establishing the Structures of Ring  Opening products of 3- Methyl- 4,1- Benzoxazepine-2,5- Dione in Acid and  Basic Media

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Title:	Use of NMR and Mass Spectrometry in Establishing the Structures of Ring Opening products of 3- Methyl- 4,1- Benzoxazepine-2,5- Dione in Acid and Basic Media
Authors:	SAMINA ALAM ZAHEER-UD-DIN BABER KHAN, NAEEMA
Issue Date:	3-Dec-2000
Publisher:	Karachi: International Centre for Chemical and Biological Sciences, H.E.J. Research Institute of Chemistry, University of Karachi
Citation:	Alam, S., Baber, Z. U. D., & Khan, N. (2000). Use of NMR and mass spectrometry in establishing the structures of ring opening products of 3-methyl-4, 1-benzoxazepine-2, 5-dione in acid and basic media. JOURNAL OF THE CHEMICAL SOCIETY OF PAKISTAN, 22(4), 299-302.
Abstract:	3-Methyl-4,1-benzoxazepine-2.5-dione (I) when stirred for lr hours in methanolic solution with a few drops of 10 %. NaOH below 60 degreesC gave solid crystalline product (m.p. 100-102 degreesC, 51% yield). H-1 NMR and MS analysis confirmed structure (II) which suggest the cleavage of C-O bond but when (I) was treated with a few drops of 10% HCl under similar temperature yielded compound (III) as a liquid which gave evidence for C-N bond cleavage giving no traces of the former product (II).
URI:	http://142.54.178.187:9060/xmlui/handle/123456789/19561
ISSN:	0253-5106
Appears in Collections:	Issue 04

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