An effective procedure for the synthesis of acid-sensitive epoxides: Use of 1-methylimidazole as the additive on methyltrioxorhenium-catalyzed epoxidation of alkenes with hydrogen peroxide
The present invention provides a microchannel reactor that is used as a new reaction device capable of greatly expanding the utilization range of chemical reactions occurring in microspaces. A solution of a soluble linear polymer containing ligands and a solution of a soluble transition metal molecule are individually introduced into a microreactor, the flows are merged inside a microchannel and a metal polymer membrane of a complex formed is generated at the interface of the flows. The membrane is used as a solid catalyst, and various reactions such as carbon-carbon bond formation reactions, oxidation reactions and the like can be conducted at extremely fast reaction rates.
Rieser Matthew J., Hui Yu-hua, Rupprecht J. Kent, Kozlowski John F., Wood+, J. Amer. Chem. Soc, 114 (1992) N 26, S 10203-10213
作者:Rieser Matthew J., Hui Yu-hua, Rupprecht J. Kent, Kozlowski John F., Wood+
DOI:——
日期:——
TASTE MODIFIERS
申请人:Givaudan SA
公开号:EP2858516B1
公开(公告)日:2017-06-07
An effective procedure for the synthesis of acid-sensitive epoxides: Use of 1-methylimidazole as the additive on methyltrioxorhenium-catalyzed epoxidation of alkenes with hydrogen peroxide
作者:Shigekazu Yamazaki
DOI:10.1039/b926575a
日期:——
An effective method for suppression of ring opening and rearrangement of acid-sensitive epoxides during methyltrioxorhenium(MTO)-catalyzed epoxidation of alkenes with H2O2 by using 1-methylimidazole as a co-additive has been found. The combined use of 3-methylpyrazole and 1-methylimidazole as the additives has been found to be an effective procedure that affords excellent yields of acid-sensitive epoxides for MTO-catalyzed epoxidation.