Immobilisation of ketone catalyst: a method to prevent ketone catalyst from decomposing during dioxirane-mediated epoxidation of alkenes
作者:Choong Eui Song、Jin Seok Lim、Su Chang Kim、Kee-Jung Lee、Dae Yoon Chi
DOI:10.1039/b005604i
日期:——
Covalent attachment of trifluoromethyl ketone catalyst to a
solid support such as silica gel increased the stability of catalyst
dramatically, so solving an intrinsic problem of dioxirane-mediated
epoxidation of alkenes catalysed by ketones.
[EN] NOVEL DIAZASPIROALKANES AND THEIR USE FOR TREATMENT OF CCR8 MEDIATED DISEASES<br/>[FR] NOUVEAUX DIAZASPIROALCANES ET LEUR UTILISATION DANS LE TRAITEMENT DE MALADIES INDUITES PAR CCR8
申请人:ASTRAZENECA AB
公开号:WO2005040167A1
公开(公告)日:2005-05-06
The invention provides compounds of general formula. wherein A, B, W, X, Y, Z, D, E, R1 and n are as defined in the specification, processes for their preparation, pharmaceutical compositions containing them and their use in therapy.
A New and Efficient One-Pot Preparation of Alkyl Halides From Alcohols
作者:Francisco Camps、Vicens Gasol、Angel Guerrero
DOI:10.1055/s-1987-27988
日期:——
Primary alkanols and 2-alkenols are converted into the corresponding halides in high yield by a one-pot, two-step reaction via transformation into intermediate trifluoroacetates followed by nucleophilic substitution with lithium halides.