THE FORMATION OF DIHYDROHYDROXYSPIRO[1,2]OXAZINES FROM THE REACTION OF FISCHERS BASE WITH SOME ISONITROSO COMPOUNDS - A MULTINUCLEAR NMR-STUDY

Authors
CHRISTIE RM AGYAKO C MITCHELL K LYCKA A
Citation
Rm. Christie et al., THE FORMATION OF DIHYDROHYDROXYSPIRO[1,2]OXAZINES FROM THE REACTION OF FISCHERS BASE WITH SOME ISONITROSO COMPOUNDS - A MULTINUCLEAR NMR-STUDY, Dyes and pigments, 31(2), 1996, pp. 155-170
Citations number
17
Categorie Soggetti
Chemistry Applied
Journal title
Dyes and pigments → ACNP
ISSN journal
01437208
Volume
31
Issue
2
Year of publication
1996
Pages
155 - 170
Database
ISI
SICI code
0143-7208(1996)31:2<155:TFODFT>2.0.ZU;2-O
Abstract
Attempts to prepare photochromic spiro[1,4]oxazines 5a-5c by the react ion of isonitroso compounds 4a-4c with Fischer's base led instead to t he 1,3,3-trimethylspiro[indoline-2 ,6'-[4'H]-5',6'-dihydro-4'-hydroxy- 1,2-oxazines] 7a-7c. In each case, a multinuclear NMR study confirmed that the products were mixtures of the two possible diastereoisomers. The isomer ratio was found to change over a period of time. (C) 1996 E lsevier Science Ltd