592-90-5Relevant articles and documents
Silver(I)-Catalyzed Reductive Cross-Coupling of Aldehydes to Structurally Diverse Cyclic and Acyclic Ethers
Dong, Guichao,Li, Chuang,Liang, Ting,Xu, Xin,Xu, Zhou
supporting information, p. 1817 - 1821 (2022/03/16)
A range of medium-sized cyclic ethers (5 to 11 membered) have been effectively synthesized through intramolecular reductive coupling of dialdehydes initiated by 50 ppm to 0.5% of AgNTf2 with hydrosilane at 25 °C. The catalytic system is also suitable for the coupling of two different monoaldehydes to provide unsymmetrical ethers. This protocol features broad functional group compatibility, high product diversity, high efficiency, and utility in the late-stage modification of complex biorelevant molecules.
Synthetic method of epoxide
-
Paragraph 0020; 0034; 0035; 0036, (2018/10/11)
The invention discloses a synthetic method of epoxide. Hydrogen peroxide is used as an oxidant, and a catalytic system consisting of a catalyst and solvent is used for catalyzing a reactant comprisinga carbon-carbon double bonds and at least one other functional group to synthesize the epoxide; in the catalytic system, the solvent is a mixture of alcohol and water, and the catalyst is a metal ionmodified mixture consisting of an MWW structure titanium silicon molecular sieve and a carrier; and the weight percent of the titanium silicon molecular sieve in the catalyst is not less than 20 percent of the total weight of the catalyst, the type of metal ions is expressed as MXO by virtue of a molecular expression of metal oxide, wherein X is equal to 1 or 2, the weight percent is 0.05 to 3 percent of the total weight of the catalyst by calculating with the content of metal atoms M, and the carrier is at least one of silicon dioxide, aluminum oxide and aluminum phosphate with the balance weight. By utilizing the catalyst system, the epoxide can be high actively and high selectively synthesized in a catalytic manner; and the reaction process is simple and environment-friendly, the energy consumption is low, and the industrialized production and application are easy.
Synthesis of cyclic ethers from diols in the presence of copper catalysts
Bayguzina,Gimaletdinova,Khusnutdinov
, p. 1840 - 1843 (2018/02/06)
A number of cyclic ethers, namely tetrahydrofuran, 2,5-dimethyltetrahydrofuran, tetrahydropyran, 1,4-dioxane, oxepane, oxocane, and 1,4-oxathiane, have been synthesized in high yields by intramolecular dehydration of diols in the presence of copper-based catalysts.
