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Proton and carbon-13 NMR spectra of some 3,4-fused pyranocoumarins and furocoumarins

✍ Scribed by Amarendra Patra; Samir K. Panda; K. C. Majumdar; A. T. Khan; S. Saha

Publisher
John Wiley and Sons
Year
1991
Tongue
English
Weight
290 KB
Volume
29
Category
Article
ISSN
0749-1581

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✦ Synopsis

Carbon-1 3 spectral assignments of five pyrano[3,2-c] [l]benzopyran-5(2H) -ones, five pyrano[2,3-c] [l ]benzopyran-5(2H)ones and five 2-methylfuro[2,3-c] [ l ] benzopyran-4-ones and of 2-methylfuro[3, 2-c] [l]benzopyran-4-one and 4-(2-chloroallyl)-3-hydroxycoumarin were made from mutual correlations, 13C/' H coupling constant measurements and 2D X-H correlation analyses. High-resolution proton resonance assignments of these compounds are reported.

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