Glycosylation of the nitroxyl radicals, 4-acetoxy-2,2,6,6-tetramethylpiperidin-1-oxyl (4-acetoxy-TEMPO) and 3-carbamoyl-2,2,5,5-tetramethylpyrollin-1-oxyl (3-carbamoyl-PROXYL) with peracetylglycosyl fluoride as the glycosyl donor, in the presence of boron trifluoride diethyl etherate (BF(3) x OEt(2)) and an amine base afforded the corresponding hydroxylamine-O-glycosides in 25-100% yields.
Iron Chloride/4-Acetamido-TEMPO/Sodium Nitrite-Catalyzed Aerobic Oxidation of Primary Alcohols to the Aldehydes
作者:Weili Yin、Changhu Chu、Qiongqiong Lu、Jianwei Tao、Xinmiao Liang、Renhua Liu
DOI:10.1002/adsc.200900662
日期:2010.1.4
l‐1‐oxy (TEMPO) derivatives has been screened for their ability in the oxidation of primaryalcohols to the aldehydes with dioxygen under mild conditions. An evaluation of the efficiency of these 4‐substituted TEMPO derivatives in the alcoholoxidation may allow an insight into the effect of the structural variations of TEMPO on the oxidation of alcohols, which should facilitate catalyst design and
Synthesis of α-arylthioacetones using TEMPO as the<i>C</i><sub>3</sub>synthon<i>via</i>a reaction cascade of sequential oxidation, skeletal rearrangement and C–S bond formation
作者:Jiao-Xia Zou、Yi Jiang、Shuai Lei、Gao-Feng Yin、Xiao-Ling Hu、Quan-Yi Zhao、Zhen Wang
DOI:10.1039/c9ob00018f
日期:——
pathway to α-sulfenylated carbonyl compounds from commercially available thiols and universally employed TEMPO and its analogues, which act as C3 synthons through skeletal rearrangement under simple and metal-free conditions. Mechanism studies suggest that this reaction involves a consecutive radical oxidation and cation coupling process. TEMPO analogues and thiols serve as oxidants and reductive reagents
[EN] POLYMERISATION INITIATOR<br/>[FR] INITIATEUR DE POLYMÉRISATION
申请人:BASF SE
公开号:WO2010079102A1
公开(公告)日:2010-07-15
The invention relates to novel O-dialkylamino-isoureas and polymerizable compositions comprising these O-dialkylamino-isoureas of compounds of the general formula (I). The invention further relates to the use of O-dialkylamino-isoureas as polymerization initiators, especially to prepare coatings or for controlled degradation of polyolefins.
Copper-catalyzed α-aminoxylation of 1,3-dicarbonyl compounds with 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) via an aerobic oxidative sp3 C–H bond activation
作者:Xiaoyan Luo、Zheng-Lin Wang、Jing-Hai Jin、Xing-Lan An、Zhenlu Shen、Wei-Ping Deng
DOI:10.1016/j.tet.2014.09.031
日期:2014.11
facile and direct synthetic method for the construction of alkoxyamine derivatives through copper-catalyzed aerobic oxidative activation of sp3 C–H bond was developed in good to excellent yields (75−95%), by treating the readily available 1,3-dicarbonyl compounds with 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) and its derivatives. This method was also successfully applied to the preparation of quaternary