1,1-Bis-(4- ethoxyphenyl)-1′-pyrenyl ethyl (bmpm): a new fluorescent 5′ protecting group for the purification of unmodified and modified oligonucleotides
the presence of manganese(III) acetate gives naphthalenecarbaldehydes and naphthalenecarboxylic acids. Similar reactions of anthracene, pyrene, and methoxybenzenes also yield formylated and carboxylated products. It was found that the formyl group introduced to the aromatic ring was not derived from carboxymethyl radical generated directly by the thermolysis of manganese(III) acetate, but from a dicarboxymethyl
Palladium-Catalyzed, Copper(I)-Promoted Methoxycarbonylation of Arylboronic Acids with <i>O</i>-Methyl <i>S</i>-Aryl Thiocarbonates
作者:Ya-Fang Cao、Ling-Jun Li、Min Liu、Hui Xu、Hui-Xiong Dai
DOI:10.1021/acs.joc.0c00198
日期:2020.3.20
Here, we report O-methyl S-aryl thiocarbonates as a versatile esterification reagent for palladium-catalyzed methoxycarbonylation of arylboronic acid in the presence of copper(I) thiophene-2-carboxylate (CuTC). The reaction condition is mild, and a variety of substituents including sensitive -Cl, -Br, and free -NH2 could be tolerated. Further applications in the late-stage esterification of some pharmaceutical
Oxidative Esterification of Aldehydes and Alcohols Catalyzed by Camphor-Based Imidazolium Salts
作者:Tiancen Bian、Li Feng、Danfeng Li、Jiaxin Huang、Yuxun Zhao、Xu Xu、Yiqin Yang、Shifa Wang
DOI:10.1007/s10562-019-03092-z
日期:2020.6
salts were observed in the oxidativeesterification between aromatic or aliphatic aldehydes containing electron-withdrawing or electron-donating groups on aromatic ring and primary or secondary alcohol by air as the sole oxidant. Graphic Abstract
摘要 以可再生樟脑磺酸为起始原料,合成了16种新型樟脑基咪唑鎓盐。对咪唑鎓环上 C 2 的特征质子 (NC=N) 的化学位移进行了深入讨论,所有这些咪唑鎓盐均表现出良好的热稳定性。此外,合成的咪唑鎓盐在芳香环上含有吸电子或给电子基团的芳香醛或脂肪醛与伯醇或仲醇在空气作为唯一氧化剂的氧化酯化反应中具有优异的催化性能。图形摘要
Sodium pyruvate as a peroxide scavenger in aerobic oxidation under carbene catalysis
NHC-Catalyzed aerobicoxidativereactions of imines and aldehydes have been developed by using sodium pyruvate as a novel and efficient peroxide scavenger. A structurally diverse set of imidates and amidines has been prepared fromimines using this strategy. This general and efficient strategy features the use of sodium pyruvate as a novel and efficient peroxide scavenger and ambient air as the sole
ELECTRODE ACTIVE MATERIAL FOR ELECTRICITY STORAGE DEVICE, AND ELECTRICITY STORAGE DEVICE USING SAME
申请人:Otsuka Yu
公开号:US20130004836A1
公开(公告)日:2013-01-03
The present invention provides an electrode active material for an electricity storage device, having a structure represented by following formula (1). In the formula (1), R
1
to R
6
each denote independently a hydrogen atom (except for a case where all of R
1
to R
6
denote hydrogen atoms), a halogen atom, an optionally substituted phenyl group, an optionally substituted heterocyclic group, or an optionally substituted hydrocarbon group having 1 to 4 carbon atoms.