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Please use this identifier to cite or link to this item: http://eprint.iitd.ac.in/handle/2074/2299

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dc.contributor.authorGandhi, R P-
dc.contributor.authorIshar, M P S-
dc.contributor.authorSrivastava, Rashmi-
dc.contributor.authorSarin, Rita-
dc.identifier.citationJournal of Photochemistry and Photobiology A: Chemistry, 78(2), 153-160p.en
dc.description.abstractSteady state photochemistry of vitamin K1 has been examined using a 1H nuclear magnetic resonance probe on solutions in CDCl3, acetone-d6, benzene-d6 and acetonitrile-d3, and a UV probe on solutions in acetone, pentane and ethanol. A rationale for formation of the major photoproduct, i.e. chromenol (1), based on electron transfer from the side-chain olefinic bond to the naphthoquinone moiety in vitamin K1, has been suggested. The new mechanistic scheme implicates, inter alia, quinone methide (6) as the precursor of 1. Attempted separation of photolysis mixture using flash chromatography has led to isolation of 9 and an oxygen adduct 10 of chromenol (1). The photoconversion of the vitamin is accelerated with catalytic amounts of triethylamine.en
dc.format.extent243348 bytes-
dc.subjectvitamin K1en
dc.subjectnuclear magneticen
dc.subjectside-chain olefinic bonden
dc.subjectnaphthoquinone moietyen
dc.subjectphotolysis mixtureen
dc.titleNuclear magnetic resonance and UV spectral probe of photochemical steady states of vitamin K1en
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