Calcium hypophosphite mediated deiodination in water: mechanistic insights and applications in large scale syntheses of <scp>d</scp>-quinovose and <scp>d</scp>-rhamnose
作者:Zejin Song、Lingkui Meng、Ying Xiao、Xiang Zhao、Jing Fang、Jing Zeng、Qian Wan
DOI:10.1039/c8gc03851a
日期:——
The inorganic calcium hypophosphite was found to be a cheap, non-toxic, water-soluble and environmentally friendly reducing reagent for radical deiodination in water. Thorough mechanism studies revealed that calcium hypophosphite was oxidized to water insoluble calcium phosphite which was the major co-product of the deiodination reaction. Based on this observation, a practical synthesis of rare D-quinovose
Abstract The structure of teucrioside, a new phenylpropanoidglycoside isolated fromTeucriumchamaedrys has been elucidated as 3,4-dihydroxy-β-phenylethoxy- O -α- l -lyxopyranosyl-(1→2)-α- l -rhamnopyranosyl-(1→3)-4- O - caffeoyl-β- d -glucopyranoside.
Design, Synthesis, and Biological Testing of 4β-[(4-Substituted)-1,2,3-triazol-1-yl]podophyllotoxin Analogues as Antitumor Agents
作者:Pitta B. Reddy、David V. Paul、Satyam K. Agrawal、Ajit K. Saxena、Halmuthur M. S. Kumar、Ghulam N. Qazi
DOI:10.1002/ardp.200700116
日期:2008.2
A series of 4β‐[(4‐substituted)‐1,2,3‐triazol‐1‐yl]podophyllotoxinanalogues have been synthesized with high regio‐selectivity by employing copper(I)‐catalyzed 1,3‐dipolar cycloaddition of 1‐O‐propargyl monosaccharides with C4β‐azido podophyllotoxin and C4β‐azido‐4′‐O‐demethyl podophyllotoxin. All the compounds were evaluated for their anticancer activity against a panel of six human cancer cell lines