oxazine

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oxazine

(ˈɒksəˌziːn)
n
(Elements & Compounds) any of 13 heterocyclic compounds with the formula C4H5NO
[from oxy-2 + azine]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

ox•a•zine

(ˈɒk səˌzin, -zɪn)

n.
any of a group of 13 compounds having the formula C4H5NO, the atoms of which are arranged in a six-membered ring.
[1895–1900]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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References in periodicals archive ?
[pi] in poly(oxazines) and demonstrated that such bonds contribute to the improvement of their thermal properties, such as elevated glass transition temperatures [18-20].
The high quantum yield of fluorescence was reported for laser organic dyes (xanthenes, oxazines, 7-aminocoumarins) [11].
Oxazines [14] and quinazolines [15] are natural products which exhibit a widespread spectrum of biological activity including antitumor [16-18], anti-inflammatory [19], and antiplatelet [20] properties.
Among the topics are organic building blocks for molecular engineering, the design and synthesis of organic molecules for molecular electronics, molecular storage systems for solar thermal energy storage and conversion, strategies to switch fluorescence with photochromic oxazines, recognizing carbohydrates, the synthesis and function of cyclodextrin-based artificial enzymes, and dendrimers in biology and nanomedicine.
Koycii, "Synthesis of new 1,3-disubstituted-2,3-dihydro-1H-naphth- [1,2e][1,3] oxazines," Molecules, vol.
Additionally, the polymerization of N-allyl groups at lower temperature (17) before the ring-opening polymerization of oxazines lead to a mild crosslinking state which would affect the mobility of reaction functional groups, which also could resulted in a higher E.
The large numbers of biologically active molecules that contain the oxazine nucleus has play important roles in the drug discovery process and exhibit various biological activities [1, 2].
The reaction involves the use of a di-functional phenolic derivative and diamine, producing a linear polymer that contains oxazine rings in its main-chain [20].
FTIR (KBr): v = 1498 (tri-substituted phenyl group); 1231 (s; [v.sub.as] (C-O-C of benzoxazine ring)), 1016 (s; [v.sub.s] (C-O-C of benzoxazine ring)); 1085 (s; vas (Si-O-C)); 931 (oxazine ring).
According to Wang and Ishida 2000, the polymerization occurred at oxazine structure via ring opening influence by distortion of its semichair structure above and below benzene ring plane.
1), the characteristic resonances of oxazine ring at 3.97 and 4.84 ppm belonging to the -C[H.sub.2]-N--and 0-C[H.sub.2]-N- protons, respectively, were observed.