Metal-Containing Ionic Liquids as Efficient Catalysts for Hydroxymethylation in Water
作者:Katharina Bica、Peter Gaertner
DOI:10.1002/ejoc.200800323
日期:2008.7
The iron-containing ionicliquid butylmethylimidazolium tetrachloroferrate (bmim-FeCl4) proved to be an efficient and recyclable catalyst for the hydroxymethylation of β-keto esters using aqueous formaldehyde and a low catalyst loading of up to 0.1 mol-% without co-solvents or additional surfactants. An useful and high-yielding approach to hydroxymethylated keto esters as well as to 3-disubstitued
Iron-catalyzed Direct-type Hydroxymethylation of 1,3-Dicarbonyl Compounds in Water
作者:Chikako Ogawa、Shu Kobayashi
DOI:10.1246/cl.2007.56
日期:2007.1
Direct-type hydroxymethylation of 1,3-dicarbonylcompounds with aqueous formaldehyde proceeded smoothly in water in the presence of Fe(NO 3 ) 3 ·9H 2 O and sodium dodecylbenzenesulfate (SDBS), to afford the corresponding products in good to high yields.
Hydroxymethylation of active methenyl compounds: DMSO as methylene source and H2O as oxygen source
作者:Liang Zhang、Shuhua Liu、Yunliang Lin、Yuliang Wang
DOI:10.1016/j.tetlet.2022.153663
日期:2022.3
and efficient method for hydroxymethylation of active methenyl compounds has been described. In this transformation, the widely available solvents DMSO and H2O served as methylene and oxygen sources, respectively. Under promotion of activator and base, the reaction could be used for the construction of a series of α-hydroxymethylated carbonyl compounds with all-carbon quaternary carbon center in good
已经描述了一种温和有效的活性亚甲基化合物羟甲基化方法。在这种转化中,广泛使用的溶剂 DMSO 和 H 2 O 分别作为亚甲基和氧源。在活化剂和碱的促进下,该反应可用于构建一系列全碳季碳中心的α-羟甲基化羰基化合物,收率良好。
ANTI-VIRAL NUCLEOSIDE ANALOGS AND METHODS FOR TREATING VIRAL INFECTIONS, ESPECIALLY HIV INFECTIONS
申请人:Cheng Yung-chi
公开号:US20120252751A1
公开(公告)日:2012-10-04
The present invention relates to novel compounds according to the general formulas I, II, III, IV or V:
wherein B is nucleoside base according to the structure:
and the remaining variables as defined in the specification, and pharmaceutical compositions comprising the compounds. The compounds are useful interalia as anti-viral agents in viral therapy.
The methanesulfenylation of various mercaptans and β-dicarbonyls has been investigated using in-situ generated methyl methanethiosulfonate (MMTS) from DMSO, facilitated by a catalytic amount of (CO...