Thermo??and photochromic dyes: Spiro (indolinebenzopyrans). 2—detailed assignment of the 1H NMR spectra and structural aspects of the closed form of 1, 3, 3?? …

…, KB Lee, PM Kazmaier, RA Manderville…

文献索引：Keum, Sam-Rok; Lee, Ki-Bong; Kazmaier, Peter M.; Manderville, Richard A.; Buncel, Erwin Magnetic Resonance in Chemistry, 1992 , vol. 30, # 11 p. 1128 - 1131

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被引用次数: 32

摘要

Abstract 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 ...