THERMOCHROMIC AND PHOTOCHROMIC DYES - SPIRO(INDOLINEBENZOPYRANS) .2. DETAILED ASSIGNMENT OF THE H-1-NMR SPECTRA AND STRUCTURAL ASPECTS OF THE CLOSED FORM OF 1,3,3-TRIMETHYLSPIRO(INDOLINE-2,2'-BENZOPYRANS)

被引:46
作者
KEUM, SR
LEE, KB
KAZMAIER, PM
MANDERVILLE, RA
BUNCEL, E
机构
[1] XEROX RES CTR CANADA LTD,MISSISSAUGA L5K 2L1,ONTARIO,CANADA
[2] QUEENS UNIV,DEPT CHEM,KINGSTON K7L 3N6,ONTARIO,CANADA
关键词
THERMOCHROMIC AND PHOTOCHROMIC DYES; SPIRO(INDOLINE-2,2'-BENZOPYRANS); H-1 NMR ASSIGNMENTS;
D O I
10.1002/mrc.1260301119
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The proton NMR assignments for a series of 12 thermo- and photochromic 1,3,3-trimethylspiro(indoline-2,2'-benzopyrans) dyes is reported. All of the protons in the dye molecule were assigned through a combination of homonuclear decoupling experiments and correlation spectroscopy. The relative stereochemistry of the indolino gem-dimethyl groups was assigned so that, for the S-epimer, the pro-R methyl was found to resonate at 1.24 ppm while the pro-S methyl appeared at 1.37 ppm for compound 1.
引用
收藏
页码:1128 / 1131
页数:4
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