Abstract:
The present invention refers to a process for producing 5‐[4‐(2‐hydroxy‐2‐methyl)‐1‐oxo‐prop‐1‐yl]‐3‐[4‐(2‐hydroxy‐2‐methyl)‐1‐oxo‐prop‐1‐yl‐ phenyl]‐2,3‐dihydro‐1,1,3‐trimethyl‐ H‐indene (dimer isomer 5) that comprises the synthesis from cumene and dimerization of 2‐methyl‐1‐(4‐(prop‐1‐en‐2‐yl)phenyl)propan‐1‐one in the presence of acid catalysts.
Abstract:
This invention relates to novel processes for synthesizing N-(4-cyclohexyl-3-trifluoromethyl-benzyloxy)-acetimidic acid ethyl ester and to the compound of formula I and other intermediates that are used in such processes.
Abstract:
One embodiment disclosed in the invention is the efficient synthesis of halogenated biaryl starting material via Grignard chemistry and the use thereof. Another embodiment of the invention is the reaction of catalyzed carbonylation of the 3'-(2'-halo-biphenyl-4-ylmethyl)-1,7'-dimethyl-2'-propyl-1H,3'H-[2,5']bibenzoimidazolyl (TLMH) using either gaseous carbon monoxide in a solvent mixture containing water; or formic acid salts optionally together with acetic acid in anhydrous solvent.
Abstract:
Polybrominated bisaryl compounds containing bromomethyl or bromomethylene groups are provided, as well as flameproof polymeric formulations comprising the compounds. The novel compounds exhibit a good thermal stability, and are particularly suitable for flame-retarding polystyrene thermoplastic foams. A process for making the polybrominated bisaryl compounds is also provided.
Abstract:
The present invention discloses a process for the preparation of highly pure Pentabromobenzyl bromide, PBB-Br, wherein the benzylic bromination reaction is carried out in a suitable organic solvent in the presence of water and wherein the reaction temperature is such that it is sufficient to activate the initiator but not high enough to consume a substantial amount thereof.
Abstract:
The present invention relates to a simple process for preparing specifically substituted indenes of formula (I) or (Ia) to compounds of formula (II) serving as starting materials and to the use of the compounds of formula (II) as starting materials for the synthesis of substituted indenes.
Abstract:
A solid acid catalyst with which a reaction proceeding with a BrFnsted acid or Lewis acid catalyst is efficiently conducted, for example, the benzoylation of an alcohol can be easily conducted, and which can be easily recovered and reused. The solid acid catalyst is excellent from the standpoints of toxicity, environment, etc. An arylbis(perfluoroalkylsulfonyl)methane represented by the general formula [1] (wherein R represents (un)substituted aryl and Rf and Rf each independently represents perfluoroalkyl), e.g., pentafluorophenylbis(perfluoroalkylsulfonyl)methane, is fixed to a polystyrene resin through bonding in the para-position to thereby obtain a polystyrene-supported arylbis(perfluoroalkylsulfonyl)methane represented by the general formula [3] (wherein R represents (un)substituted arylene and Rf and Rf are the same as defined above).
Abstract:
A novel, optically active, quaternary ammonium salt with axial asymmetry which is useful as a phase-transfer catalyst with which a glycine derivative is stereoselectively alkylated to convert it into an optically active alpha -amino acid derivative. The quaternary ammonium salt is, for example, a compound represented by the formula (I). The quaternary ammonium salt is usable as a phase-transfer catalyst for stereoselectively alkylating a compound having a specific structure.
Abstract:
Disclosed is a method of chlorinating the side chains of an aromatic compound having general formula (I) where each R is independently selected from R' or OR', each R' is independently selected from alkyl from C1 to C6, and n is an integer from 1 to 3. Some of the aromatic compound is incompletely alpha -chlorinated using about 0.1 to about 0.6 equivalents of chlorine per equivalent of the aromatic compound. The alpha -chlorinated aromatic compound is separated from unreacted aromatic compound and the alpha -chlorinated aromatic compound is further chlorinated. The two step chlorination of the aromatic compound reduces ring chlorination.
Abstract:
Methods of C-H bond fluorination using non-heme manganese catalyst are described herein. For example, a method comprises providing a reaction mixture including a non-heme manganese catalyst, a substrate comprising an sp 3 C-H bond and a fluorinating agent and converting the sp 3 C-H bond to a C-F bond in the presence of the non-heme manganese catalyst or a derivative thereof.