An efficient protocol for the Cα-H heteroarylation of ethers, amides, and alcohols using air and light under mild conditions is described. The reaction is applicable to a wide spectrum of functional groups. The generation of C-radicals via photoinduced aerobic oxidation of ethers, amides, and alcohols is the key feature of the process. Control experiments suggest a radical pathway for the reaction
描述了在温和条件下使用空气和光对醚、酰胺和醇进行 Cα - H 杂芳基化的有效方案。该反应适用于广泛的官能团。通过醚、酰胺和醇的光诱导有氧氧化产生 C-自由基是该过程的关键特征。对照实验表明该反应的自由基途径。
Photocatalytic redox-neutral hydroxyalkylation of <i>N</i>-heteroaromatics with aldehydes
radical, 2) cleavage of the formyl C‒H bond of the aldehyde substrates by a thiyl radical acting as a hydrogen atom transfer catalyst to generate acyl radicals, 3) Minisci-type addition of the resulting acyl radicals to N-heteroaromatics, and 4) a spin-center shift, photoredox-catalyzed single-electron reduction, and protonation to produce secondaryalcohol products. This metal-free hybrid catalysis proceeded
Carbon nitride as a heterogeneous visible-light photocatalyst for the Minisci reaction and coupling to H<sub>2</sub> production
作者:Arjun Vijeta、Erwin Reisner
DOI:10.1039/c9cc07348e
日期:——
major limitations of previously reported photoredox-mediated Minisci reactions: (i) use of expensive and potentially harmful non-recyclable photocatalysts, and (ii) requirement of a stoichiometric amount of strong chemical oxidant. Finally, using platinum as a co-catalyst with the carbon nitride allows this light-mediated reaction to generate two value-added products under an anaerobic atmosphere –
Compounds of Formula I, their preparation and uses are described:
1
wherein:
M and V are cis to one another and MH is cytarabine;
the 5′ oxygen of said cytarabine is attached to the phosphorus;
V is 4-pyridyl;
and pharmaceutically acceptable prodrugs and salts thereof.
Stable analogues of ribose-1-phosphate and methods for treating diabetes and other metabolic disorders
申请人:Linn Saul Gregory
公开号:US20070099851A1
公开(公告)日:2007-05-03
Novel D-ribose-1-phosphate analogue compounds of formula I, pharmaceutically acceptable prodrugs and salts thereof, and their use as hypoglycemic agents and anticancer agents and regulators of carbohydrate metabolism are useful for the treatment of diabetes in humans and for the treatment of various metabolic disorders that involve the regulation of cellular metabolism, e.g. cancer