Showing papers by "Kirpal S. Bisht published in 1994"
40 citations
TL;DR: Two new flavones, 5,7,2′-trihydroxy-6,4′-dimethoxyflavone (tamaridone) and 5,2,4''trihexyl-hexacosyl-p-coumarate, were isolated from the aerial parts of Tamarix dioica.
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TL;DR: Investigations of 13 species of red algae showed that only some samples of species of the families Gigartinaceae, Hypnaceae and Solieriaceae (all of order Gigartinales) contained isethionates.
Abstract: Isethionic acid (2-hydroxyethanesulfonic acid) was isolated as salts from a methanolic extract ofHypnea musciformis collected in the Indian Ocean and identified by comparison (nuclear magnetic resonance, infrared and mass spectrometry) with an authentic sample. The compound has not previously been reported from plants. Investigations of 13 other species of red algae showed that only some samples of species of the families Gigartinaceae, Hypnaceae and Solieriaceae (all of order Gigartinales) contained isethionates.
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TL;DR: Regioselectivity has been observed in the deacetylation of peracetates of polyphenolic aromatic ketones by lipases from porcine pancreas and Candida cyclindracea suspended in organic solvents.
16 citations
TL;DR: Two new neolignans, (7R,8R,3′R)-7-acetoxy-3′,4′-dimethoxy -3,4-methylenedioxy-6′-oxo-Δ-1′, 4′, 8′-8.8.
16 citations
TL;DR: In this paper, the authors used spectropic data (1 H, 2D- and 13 C NMR, NOE, UV, IR and MS) for the extraction of the stems of Piper wightii Miq.
DOI•
01 Oct 1994TL;DR: The text gives an insight into the variety of substrates accepted by these lipases and their potential applications to catalyse reactions regio-, chemo-, enantio- and diastereoselectively to produce compounds of industrial, commercial, pharmaceutical and synthetic interest.
Abstract: Organic reactions catalysed by commercially available lipases, reported in recent years from our own laboratory and those published by others are described, confining the discussions to esteriflcation and hydrolytic reactions only. The text gives an insight into the variety of substrates accepted by these lipases and their potential applications to catalyse reactions regio-, chemo-, enantio- and diastereoselectively to produce compounds of industrial, commercial, pharmaceutical and synthetic interest.