Manganese-Catalyzed Epoxidations of Alkenes in Bicarbonate Solutions
作者:Benjamin S. Lane、Matthew Vogt、Victoria J. DeRose、Kevin Burgess
DOI:10.1021/ja025956j
日期:2002.10.1
screening, for the epoxidation of alkenes. It useshydrogenperoxide as the terminal oxidant, is promoted by catalytic amounts (1.0-0.1 mol %) of manganese(2+) salts, and must be performed using at least catalytic amounts of bicarbonate buffer. Peroxymonocarbonate, HCO(4)(-), forms in the reaction, but without manganese, minimal epoxidation activity is observed in the solvents used for this research
Acid-Catalyzed Reactions of Epoxides for Atmospheric Nanoparticle Growth
作者:Wen Xu、Mario Gomez-Hernandez、Song Guo、Jeremiah Secrest、Wilmarie Marrero-Ortiz、Annie L. Zhang、Renyi Zhang
DOI:10.1021/ja508989a
日期:2014.11.5
acid nanoparticles of 4-20 nm are exposed to epoxide vapors, dependent on the particle size and relative humidity. Composition analysis of the nanoparticles after epoxide exposure reveals the presence of high molecular weight organosulfates and polymers, indicating the occurrence of acid-catalyzedreactions of epoxides. Our results suggest that epoxides play an important role in the growth of atmospheric
Cobalt(II)chloride catalysed cleavage of ethers with acyl halides: Scope and mechanism
作者:Javed Iqbal、Rajiv Ranjan Srivastava
DOI:10.1016/s0040-4020(01)96041-7
日期:1991.5
Cobalt (II) chloride in acetonitrile catalyses the cleavage of a wide variety of ethers with acyl halides under mild conditions to give the corresponding esters in good yields. Acyclic aliphatic ethers are cleaved to the corresponding ester and chlorides whereas the cyclic aliphatic ethers give rise to the ω-chloroesters. The benzyl ethers can be converted to the corresponding esters along with the
乙腈中的氯化钴(II)在温和的条件下催化多种醚与酰基卤的裂解,从而以高收率得到相应的酯。无环脂族醚裂解成相应的酯和氯化物,而环脂族醚产生ω-氯代酯。苄基醚可与苄基氯和苄基乙酰胺一起形成相应的酯。烯丙基和苄基醚裂解的比较研究表明,苄基醚可以在烯丙基醚存在下选择性裂解。可以以高度区域选择性的方式将环氧乙烷酮裂解为相应的β-氯代酯。乙烯基醚经历sp 2在这些条件下的-杂化的碳-氧键裂解。基于产物分析,讨论了涉及电子转移,随后进行O-酰化以及氯离子对S N 1或S N 2的攻击的机理。
METHOD FOR MANUFACTURING AN EPOXY COMPOUND AND METHOD FOR EPOXIDIZING A CARBON-CARBON DOUBLE BOND
申请人:Takumi Kiyoshi
公开号:US20120108830A1
公开(公告)日:2012-05-03
The present invention provides a method for producing an epoxy compound, comprising oxidizing a carbon-carbon double bond of an organic compound by hydrogen peroxide in the presence of a neutral inorganic salt and a mixed catalyst of a tungsten compound (a), at least one phosphorus compound selected from the group consisting of phosphoric acids, phosphonic acids, and salts thereof (b) and a surfactant (c), and an epoxidizing method comprising oxidizing a carbon-carbon double bond by hydrogen peroxide in the presence of the catalyst and the neutral inorganic salt.
Catalytic Activity of Crystallographically Characterized Organic–Inorganic Hybrid Containing 1,5-Di-amino-pentane Tetrachloro Manganate with Perovskite Type Structure
作者:Paramita Mondal、Seham Kamal Abdel-Aal、Debasis Das、Sk Manirul Islam
DOI:10.1007/s10562-017-2112-7
日期:2017.9
crystal had orthorhombic non-centrosymetric system having I212121 space group with unit cell parameters a = 7.1742(3) Å, b = 7.3817(3) Å, c = 23.9650(10) Å, V = 1269.13 Å3 and Z = 4. The hybrid exhibited excellent catalytic activity towards sulphide and alkeneoxidation using aqueous H2O2 as an oxidant.Graphical AbstractOIHS of the diammonium series [NH3–(CH2)5–NH3] MnCl4; 1,5 di-aminepentane tetrachloro