621-87-4Relevant articles and documents
2-Chloro-1-(chloromethyl)ethyl Methoxymethyl Ether as a Reagent for Acetonylation of Alcohols and Phenol
Gu, Xue-Ping,Ikeda, Isao,Komada, Satoru,Masuyama, Araki,Okahara, Mitsuo
, p. 5425 - 5427 (1986)
-
Catalytic Activity of Various Salts in the Reaction of 2,3-Epoxypropyl Phenyl Ether and Carbon Dioxide under Atmospheric Pressure
Kihara, Nobuhiro,Hara, Nobutaka,Endo, Takeshi
, p. 6198 - 6202 (1993)
Reaction of 2,3-epoxypropyl phenyl ether (1) with carbon dioxide was carried out under atmospheric pressure in N-methylpyrrolidinone (NMP) at 100 deg C in the presence of 5 mol percent of various salts to obtain a five-membered cyclic carbonate, 4-(phenoxymethyl)-1,3-dioxolan-2-one (2), selectively.Only halide salts showed high catalytic activity, and the order of intrinsic activity was found to be as follows: chloride > bromide > iodide which is the order of nucleophilicity of the anion.Furthermore, the order of the activity was found to be lithium salt > sodium salt > benzyltrimethylammonium salt, which is in accord with the order of Lewis acidity of the cation.Kinetic analyses show that the reaction rate can be represented by -d/dt=k, where the carbon dioxide pressure shows no effect on the reaction rate.The reaction proceeds via nucleophilic attack of halide to oxirane to form β-haloalkoxide 4 which reacts with CO2 followed by cyclization.The presence of key intermediate 4 was indirectly proved by the reaction of 1 with 1 equiv of LiBr in the absence of CO2 at 100 deg C for 2.5 h in NMP which leads to 1-phenoxy-2-propanone (6) in 20percent yield as the rearrangement product of 4.
Oxidation of alcohols using an oxoammonium salt bearing the nitrate anion
Miller, Shelli A.,Sandoval, Arturo León,Leadbeater, Nicholas E.
supporting information, (2019/12/25)
A methodology for the oxidation of alcohols to the corresponding carbonyl compounds is reported using a sub-stoichiometric quantity of an oxoammonium salt bearing the nitrate counterion. The approach proves successful for the oxidation of a range of alcohol substrates including those bearing an oxygen atom β to the site of oxidation or an α-trifluoromethyl moiety. The mechanism of the reaction has been probed and also gives an insight into the previously reported nitric acid mediated oxidation of alcohols.
Synthesis and Catalytic Properties of Metal- N-Heterocyclic-Carbene-Decorated Covalent Organic Framework
Dong, Ying,Dong, Yu-Bin,Kan, Jing-Lan,Li, Yue,Wu, Xiaowei
supporting information, p. 7363 - 7368 (2020/10/12)
We demonstrate herein that the N-heterocyclic-carbene (NHC)-metal complex (NHC-M)-involved covalent organic framework (COF) can be prepared by the direct polymerization of the NHC-M monomer with its counterpart under solvothermal conditions. The NHC-M-COF with different counterions is readily achieved via solid-state anion exchange. The obtained NHC-AuX-COF (X = Cl- and SbF6-) can be a highly active reusable catalyst to separately promote the carboxylation of the terminal alkyne with CO2 and alkyne hydration under mild conditions.