聚乙烯吡咯烷酮(PVP–N 2 O 4)上负载的四氧化二氮:一种新的硫醇亚硝化和偶联剂,以及一种硫化物和二硫化物的选择性氧化剂
摘要:
将气态N 2 O 4固定在聚乙烯吡咯烷酮上,得到稳定的聚合试剂。硫醇转化为小号在使用这个新的亚硝化剂-nitrosothiols(thionitrites)ñ -己烷或氯仿3在10℃下。使用该试剂,硫醇也被转化为其相应的二硫化物。在室温下,也可以通过该试剂将硫化物选择性氧化为亚砜,将二硫化物选择性氧化为硫代磺酸盐。通过使用过量的试剂,在室温下也从硫醇选择性地一锅合成硫代磺酸盐。
Silica-Acetate Complex of N<sub>2</sub>O<sub>4</sub>: A Heterogeneous Reagent for the Selective Nitration of Phenols and Nitrosation of Thiols
作者:N. Iranpoor、H. Firouzabadi、R. Heydari
DOI:10.1081/scc-120016310
日期:2003.1.4
Abstract Complexation of gaseous N2O4 with acylated silica gel affords an addition compound, which is an efficient heterogeneous reagent for the selective mono- and dinitration of phenol, substituted phenols and nitrosation of thiols.
Silica-Polyethyleneglycols/N 2 O 4 Complexes as Heterogeneous Nitrating and Nitrosating Agents
作者:N. Iranpoor、H. Firouzabadi、R. Heydari
DOI:10.1080/10426500307863
日期:2003.5.1
Silica-chloride was reacted with different quantities of H(OCH 2 CH 2 ) n OH (n = 2-4) to furnish silica-based linear polyethylene glycols and cyclic polyethylene glycolic ethers. The N 2 O 4 complex of silica-tetraethylene glycolic ether ( III ) was selected and used as a stable, cheap, and heterogeneous silica-based reagent for the selective mono- and dinitration of phenols and nitrosation of thiols
氯化硅与不同量的 H(OCH 2 CH 2 ) n OH (n = 2-4) 反应以提供基于二氧化硅的线性聚乙二醇和环状聚乙二醇醚。选择了二氧化硅-四甘醇醚 (III) 的 N 2 O 4 络合物,并将其用作一种稳定、廉价且非均相的二氧化硅基试剂,用于苯酚的选择性单硝化和二硝化以及硫醇的亚硝化。
New syntheses of thionitrites and their chemical reactivites
作者:Shigeru Oae、Yong H. Kim、Daikichi Fukushima、K?ichi Shinhama
DOI:10.1039/p19780000913
日期:——
with other nucleophiles such as thiols, sulphinic acids, alcohols, and secondary amines at ca.–5 °C. Treatment of thionitrites with other thiols or sulphinic acids was found to yield the corresponding unsymmetrical disulphides or thiolsulphonates in good yields. Similar treatment of thionitrites with secondary amines or alcohols gave the corresponding N-nitrosoamines, or disulphides and nitrites.
通过硫醇与四氧化二氮(N 2 O 4)在温和条件下的反应,定量制备了芳基和烷基亚硫氰酸盐(RSNO)。通过在低温(例如0°C)下的红外光谱或紫外光谱或它们与亲核试剂的进一步反应生成已知的衍生物,鉴定出不稳定的亚硝酸盐。总结了这些亚硝酸盐的光谱数据,发现高反应性亚硝酸盐易于与其他亲核试剂,例如硫醇,亚磺酸,醇和仲胺,在约200℃下反应。–5°C。发现用其他硫醇或亚磺酸处理硫代亚硝酸盐可得到良好产率的相应的不对称二硫化物或硫代磺酸盐。用仲胺或醇类似地处理硫亚硝酸盐,得到相应的N-亚硝基胺或二硫化物和亚硝酸盐。
Efficient Conversion of Thiols to S-Nitrosothiols with the 18-Crown-6 Complex of N2O4 as a New Nitrosating Agent
作者:N. Iranpoor、H. Firouzabadi、R. Heydari
DOI:10.1039/a904784k
日期:——
Gaseous N2O4 reacts with 18-crown-6 to afford a stable ionic complex of NO+·18-crown-6·H(NO3)2–; this complex is an efficient nitrosating agent for the conversion of thiols to their corresponding S-nitrosothiols in different organic solvents.