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.
Acid-labile epoxides such as α-pinene oxide are (effectively) synthesized in high yield from the epoxidation of terpenes with aqueous H2O2 catalyzed by Na2WO4, [Me(n-C8H17)3N]HSO4, and PhP(O)(OH)2 in the presence of Na2SO4 as an auxiliary additive under organic solvent-free conditions at ambient temperature. Origin of the salt effect is considered that the addition of a saturated amount of Na2SO4 to
由Na 2 WO 4,[Me(n -C 8 H 17)3 N] HSO催化的H 2 O 2水溶液与萜烯环氧化,可高产率地合成酸不稳定的环氧化物,例如α-pine烯4和PhP(O)(OH)2在作为辅助添加剂的Na 2 SO 4的存在下于室温下在无有机溶剂的条件下进行。盐效应的起因被认为是在H 2 O 2水溶液中添加了饱和量的Na 2 SO 4。 尽管具有高酸性反应条件,但仍可强烈抑制酸不稳定的环氧产物的不良水解。 氧化-催化-环氧化物-萜类化合物-绿色化学
Process for the preparation of bicycloheptane derivatives, and novel bicycloheptane derivatives
申请人:SHELL INTERNATIONALE RESEARCH
MAATSCHAPPIJ B.V.
公开号:EP0081892A2
公开(公告)日:1983-06-22
A process for the preparation of a 2-exo-hydroxy-7-oxa- bicyclo[2.2.1]heptane, wherein the corresponding cis 3,4-expoxycyclohexanol is cyclised by treatment with an acid. Specific 2-exo-hydroxy-7-oxabicyclo[2.2.1]heptanes and intermediates thereof.
Methyltrioxorhenium-Catalyzed Epoxidation of Homoallylic Alcohols with Hydrogen Peroxide
作者:Shigekazu Yamazaki
DOI:10.1021/jo301825j
日期:2012.11.2
Homoallylic alcohols were efficiently converted to the corresponding 3,4-epoxy alcohols in excellent yields by methyltrioxorhenium (MTO)-catalyzed epoxidation with aqueous hydrogen peroxide as the terminal oxidant and 3-methylpyrazole (10 mol %) as an additive. The epoxidations of homoallylic alcohols proceeded under organic solvent-free conditions faster than those in dichloromethane.