Abstractmagnified imageFluorine‐containing compounds are useful in many applications ranging from pharmaceuticals to ferroelectric crystals. We have developed a new, highly enantioselective synthetic route to trifluoromethyl‐bearing stereocenters in up to 96% ee via asymmetric hydrogenation using N,P‐ligated iridium catalysts. We also hydrogenated an isomeric mixture of olefins; this reaction gave the hydrogenation product highly enantioselectively (87% ee), and only the E isomer was present after the reaction had reached 56% conversion.
A method of producing an aromatic ketone and an aromatic ketone composition containing it
申请人:TORAY INDUSTRIES, INC.
公开号:EP1053990A2
公开(公告)日:2000-11-22
In a method of producing an aromatic ketone an aromatic compound having an R-CH2 group ( R denotes an alkyl group, aryl group, allyl group or aralkyl group) is oxidised in liquid phase by an oxygen-containing gas in the presence of a catalyst comprising a heavy metal compound and at least one compound selected from (1) ammonia, (2) organic basic compounds and (3) onium halides while the water produced in the reaction is removed from the reaction solution.
An aromatic ketone composition produced by the process comprises the aromatic ketone and 10 ppm to 3 wt% of at least one compound selected from: a benzene derivative of the formula (II)
a vinylbenzene of the formula (III)
a benzaldehyde of the formula (IV)
where X is a substituent; n is zero or 1 to 5; R is alkyl, aryl, allyl or aralkyl and R1 is hydrogen, alkyl, aryl, allyl or aralkyl.
[EN] TRIAZINE BENZIMIDAZOLE COMPOUNDS AND MEDICAL USE THEREOF<br/>[FR] COMPOSÉS DE BENZIMIDAZOLE TRIAZINE ET LEUR UTILISATION MÉDICALE<br/>[ZH] 三嗪酮并咪唑类化合物及其医药用途
申请人:SICHUAN KELUN BIOTECH BIOPHARMACEUTICAL CO LTD