STEREO-SELECTIVE SYNTHESIS OF 2-ARYL-PROPIONIC ACIDS OF HIGH OPTICAL PURITY BY USING CHIRAL OXAZOLINES
申请人:KUNICHEM, INC.
公开号:EP0641304A1
公开(公告)日:1995-03-08
EP0641304A4
申请人:——
公开号:EP0641304A4
公开(公告)日:1994-12-13
US5248815A
申请人:——
公开号:US5248815A
公开(公告)日:1993-09-28
[EN] STEREO-SELECTIVE SYNTHESIS OF 2-ARYL-PROPIONIC ACIDS OF HIGH OPTICAL PURITY BY USING CHIRAL OXAZOLINES
申请人:KUNICHEM, INC.
公开号:WO1993013046A1
公开(公告)日:1993-07-08
(EN) The present invention relates to a stereospecific chemical synthesis of optically pure enantiomers of 2-aryl-alkanoic acids, especially those of the biologically active (S)-aryl-propionic acids, in good chemical yields, useful for preparing large quantities thereof, and having a high optical purity.(FR) La présente invention se rapporte à une synthèse chimique stéréospécifique d'énantiomères optiquement purs d'acides 2-aryl-alcanoïques, notamment d'acides (S)-aryl-propioniques biologiquement actifs, présentant de bons rendements chimiques, utiles pour préparer de grandes quantités, et possédant une grande pureté optique.
Cetyltrimethylammonium Bromide as an Efficient Catalyst for Regioselective Bromination of Alkoxy Naphthalenes with Trimethyl Benzyl Ammonium Tribromide: Synthetic and Kinetic Approach
作者:K. Rajendar Reddy、K. C. Rajanna、K. Uppalaiah、S. Ramgopal
DOI:10.1002/kin.20821
日期:2014.1
Bromination of 2‐alkoxynaphthalene (2‐ANP) and its derivatives with trimethylbenzylammonium tribromide (TMBATB) did not proceed smoothly even under reflux conditions. But the addition of microconcentrations of cetyltrimethyl ammonium bromide (CTAB) to the reaction afforded dramatic rate accelerations as well as good‐to‐excellent yield of the products ranging from 70% to 90%. Reactions underwent regioselective