Nuclear magnetic resonance and UV spectral probe of photochemical steady states of vitamin K1

dc.creatorGandhi, R P
dc.creatorIshar, M P S
dc.creatorSrivastava, Rashmi
dc.creatorSarin, Rita
dc.date.accessioned2006-12-05T03:56:32Z
dc.date.accessioned2019-02-10T14:24:54Z
dc.date.accessioned2019-02-11T06:19:29Z
dc.date.accessioned2022-07-11T08:43:35Z
dc.date.available2006-12-05T03:56:32Z
dc.date.available2019-02-10T14:24:54Z
dc.date.available2019-02-11T06:19:29Z
dc.date.available2022-07-11T08:43:35Z
dc.date.created2006-12-05T03:56:32Z
dc.date.created2019-02-10T14:24:54Z
dc.date.created2019-02-11T06:19:29Z
dc.date.issued1994
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.
dc.identifierJournal of Photochemistry and Photobiology A: Chemistry, 78(2), 153-160p.
dc.identifierhttp://localhost:8080/iit/handle/2074/2299
dc.identifier.urihttps://demo7.dspace.org/handle/10673/7906
dc.languageen
dc.subjectvitamin K1
dc.subjectnuclear magnetic
dc.subjectside-chain olefinic bond
dc.subjectnaphthoquinone moiety
dc.subjectphotolysis mixture
dc.subjecttriethylamine
dc.titleNuclear magnetic resonance and UV spectral probe of photochemical steady states of vitamin K1
dc.typeArticle
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