Visible light-promoted dihydroxylation of styrenes with water and dioxygen
作者:Bo Yang、Zhan Lu
DOI:10.1039/c7cc06745c
日期:——
The first efficient visible light promoted metal-free dihydroxylation of styrenes with water and dioxygen has been developed for the construction of vicinal alcohols. The protocol was operationally simple with broad substrate scope. The mechanistic studies demonstrated that one of the hydroxyl group came from water and the other one came from molecular oxygen. Additionally, the ß-alkyoxy alcohols could
Semisynthetic Enzymes in Asymmetric Synthesis: Enantioselective Reduction of Racemic Hydroperoxides Catalyzed by Seleno-Subtilisin
作者:Dietmar Häring、Ellen Schüler、Waldemar Adam、Chantu R. Saha-Möller、Peter Schreier
DOI:10.1021/jo981665a
日期:1999.2.1
The serine protease subtilisin was chemically converted into the peroxidase-active seleno-subtilisin. This semisynthetic enzyme catalyzes the enantioselective reduction of racemic hydroperoxides in the presence of thiophenols to yield optically active hydroperoxides and alcohols on the semipreparative scale. The kinetic parameters and enantioselectivities of seleno-subtilisin-catalyzed reduction of
Metallized mesoporous silicate and method of oxidation with the same
申请人:Hagiya Koji
公开号:US20050090688A1
公开(公告)日:2005-04-28
A metallized mesoporous silicate which is obtained by (i) reacting (a) either a metal peroxide obtained by the reaction of an aqueous hydrogen peroxide solution with at least one metal or metal compound selected from the group consisting of the following 1) to 4) 1) tungsten 2) molybdenum 3) vanadium 4) compounds comprising 4
a
) any of tungsten, molybdenum, and vanadium and 4
b
) at least one element selected from Groups
13
to
16
(excluding oxygen) or a solution of the metal peroxide with (b) a silicon compound in the presence of an alkylamine or a quaternary ammonium salt and separating the resultant silicate; and a process for producing the metallized mesoporous silicate. Also provided is a method of organic synthesis with the silicate.
Oxygenation of α-Methylstyrene with Molecular Oxygen, Catalyzed by 10-Methylacridinium Ion via Photoinduced Electron Transfer
作者:Kyou Suga、Kei Ohkubo、Shunichi Fukuzumi
DOI:10.1021/jp034213x
日期:2003.6.1
oxygen-saturated acetonitrile (MeCN) to yield acetophenone as the main oxygenated product. No photoinducedoxygenation of α-methylstyrene occurs in the absence of AcrH+ under otherwise the same experimental conditions. Little photodegradation of AcrH+ occurs in the present photocatalytic system, which provides a clean method of photoinducedoxygenation reaction with molecular oxygen, alternate to the ene reaction
METALLIZED MESOPOROUS SILICATE AND METHOD OF OXIDATION WITH THE SAME
申请人:Sumitomo Chemical Company, Limited
公开号:EP1473275A1
公开(公告)日:2004-11-03
A metallized mesoporous silicate which is obtained by (i) reacting (a) either a metal peroxide obtained by the reaction of an aqueous hydrogen peroxide solution with at least one metal or metal compound selected from the group consisting of the following 1) to 4) 1) tungsten 2) molybdenum 3) vanadium 4) compounds comprising 4a) any of tungsten, molybdenum, and vanadium and 4b) at least one element selected from Groups 13 to 16 (excluding oxygen) or a solution of the metal peroxide with (b) a silicon compound in the presence of an alkylamine or a quaternary ammonium salt and separating the resultant silicate; and a process for producing the metallized mesoporous silicate. Also provided is a method of organic synthesis with the silicate.