Efficient <i>ortho</i>-Oxidation of Phenols with Diacyl Peroxides
作者:Masahiro Tada、Risa Ishiguro、Ryohei Izumi
DOI:10.1248/cpb.56.239
日期:——
A stable symmetric diacyl peroxide, m-chlorobenzoyl peroxide (mCBPO), and an asymmetric diacyl peroxide, chloroacetyl m-chlorobenzoyl peroxide (CAMCBPO), were synthesized from m-chloroperbenzoic acid. Both peroxides oxidized phenols selectively at the ortho position predoninantly. CAMCBPO gave para-oxidized compounds as minor products from some phenols. The improvement of the yield of ortho-oxidation of phenols with mCBPO was also reported.
Fluoroboric acid adsorbed on silica gel as a new and efficient catalyst for acylation of phenols, thiols, alcohols, and amines
作者:Asit K. Chakraborti、Rajesh Gulhane
DOI:10.1016/s0040-4039(03)00683-x
日期:2003.4
Fluoroboric acid supported on silica gel efficiently catalyzes acylation of structurally diverse phenols, alcohols, thiols, and amines undersolventfree conditions. Acid-sensitive alcohols are smoothly acylated without competitive side reactions.
Indium(III) chloride as a new, highly efficient, and versatile catalyst for acylation of phenols, thiols, alcohols, and amines
作者:Asit K. Chakraborti、Rajesh Gulhane
DOI:10.1016/s0040-4039(03)01641-1
日期:2003.8
Indium(III) chloride efficiently catalyses the acylation of structurally diverse phenols, alcohols, thiols, and amines undersolventfree conditions. Acid sensitive alcohols are smoothly acylated without competitive side reactions. Acylation of 2-hydroxynaphthalene is carried out with carboxylic acids adopting the mixed anhydride protocol using trifluoroacetic anhydride.
CATALYST PROCESS MODIFICATION AND POLYMERIZATION THEREOF
申请人:INDIAN OIL CORPORATION LTD.
公开号:US20160215077A1
公开(公告)日:2016-07-28
The present invention describes a process for preparation of catalyst component comprising contacting magnesium based precursor along with an internal donor based on phenylene dioates with an acyl halides in a solvent to obtain a solid precatalyst component; and contacting the solid precatalyst component with transition metal compound to obtain the catalyst component. The present invention also relates to a process for preparation of a catalyst system from said catalyst component and preparation of a polyolefins having free flowing characteristics with bulk densities (BD) of at least about 0.3 g/cc from the catalyst system.
Provided are methods for treating cancer in a patient by administering at least one antibiotic selected from the group consisting of clofazimine, rifabutin and clarithromycin, in combination with an aryladamantane compound. In an embodiment, the aryladamantane compound is [3-(4-chlorophenyl)-adamantane-1-carboxylic acid (pyridin-4-ylmethyl)amide], or a pharmaceutically acceptable salt thereof.