An Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>/Schiff base/Cu(<scp>ii</scp>) complex as an efficient recyclable magnetic nanocatalyst for selective mono <i>N</i>-arylation of primary <i>O</i>-alkyl thiocarbamates and primary <i>O</i>-alkyl carbamates with aryl halides and arylboronic acids
the selective mono N-arylation of primary O-alkyl thiocarbamates and primary O-alkyl carbamates with aryl halides and arylboronic acids in the presence of a recyclable magnetic Cu(II) nanocatalyst is described. A variety of mono N-arylated O-alkyl thiocarbamates and O-alkyl carbamates were prepared in good to excellent yields with a broad range of aryl coupling partners. The magnetic nanocatalyst can
Effect of successive increase in alcohol chains on reaction with isocyanates and isothiocyanates
作者:Shahnaz Perveen、Arfa Yasmin、Khalid Mohammed Khan
DOI:10.1080/14786410802270738
日期:2010.1.10
The reaction of isocyanates and isothiocyanates with long-chain alcohols, e.g. n-hexanol, n-heptanol and n-octanol, exclusively gave N-aryl-O-alkyl carbamates, while N-aryl-O-alkyl carbamates were formed along with symmetrical 1,3-disubstituted ureas and thioureas when the same reactions were carried out with small-chain alcohols at room temperature without using any solvent.
Unexpected Products from Mesoionic 1,3-Thiazinium and Oxazinium Olates: A Novel Access to 3,5-Diaryl-1,3-thiazine-2,4,6-trione and Alkoxy-3,5-diphenyl-3H-1,3-oxazine-2,6-dione Derivatives
作者:Mahboobeh Zahedifar、Hassan Sheibani
DOI:10.1071/ch14095
日期:——
4-olates II, respectively. At room temperature, appropriately substituted mesoionic 1,3-thiazinium 4-olates I eliminated the corresponding alkene with generation of 3,5-diaryl-1,3-thiazine-2,4,6-trione derivatives 3. However, the methoxy-substituted compound 5 was stable at room temperature at least for several weeks. In the case of the mesoionic1,3-oxazinium 4-olates II an alkyl group migration affords 4-alkoxy-3
Investigation of putative arene-C–H⋯π(quasi-chelate ring) interactions in copper(<scp>i</scp>) crystal structures
作者:Chien Ing Yeo、Siti Nadiah Abdul Halim、Seik Weng Ng、Seng Lim Tan、Julio Zukerman-Schpector、Marco A. B. Ferreira、Edward R. T. Tiekink
DOI:10.1039/c4cc02040e
日期:——
Interactions of the type C–H⋯π(CuCl⋯HNCS), i.e. C–H⋯π(quasi-chelate ring) where a six-membered quasi-chelate ring is closed by an N–H⋯Cl hydrogen bond, are presented.
<i>N</i>
‐Iodosuccinimide (NIS) Promoted Synthesis of Unsymmetrical Disulfides Starting from Isothiocyanates Under Transition‐Metal‐Free Conditions
作者:Cheng‐Li Yang、Hua‐Qing Xiao、Zhi‐Bing Dong
DOI:10.1002/ejoc.202200954
日期:2022.10.7
Under transition-metal-free conditions, a series of unsymmetrical disulfides could be quickly and conveniently obtained by NIS (N-Iodosuccinimide)-promotion in one pot manner. It's noteworthy that the desired products could be obtained in moderate to good yields from inexpensive and easily available starting materials, providing an alternative way to afford various unsymmetrical disulfides.
在无过渡金属条件下,通过NIS( N -Iodosuccinimide)-促进一锅法可以快速方便地获得一系列不对称二硫化物。值得注意的是,可以从廉价且易于获得的起始材料中以中等至良好的收率获得所需的产品,为提供各种不对称二硫化物提供了一种替代方法。