METHOD FOR MANUFACTURING OPTICALLY ACTIVE CARBOXYLIC ACID ESTER
申请人:Shiina Isamu
公开号:US20140135520A1
公开(公告)日:2014-05-15
A method that manufacturers an optically active carboxylic acid ester at high yield and high enantioselectivity is provided. An optically active carboxylic acid ester is manufactured at high yield and high enantioselectivity by reacting a racemic carboxylic acid and a specific alcohol or phenol derivatives in a polar solvent having a dipole moment of 3.0 or higher in the presence of an acid anhydride and an asymmetric catalyst, esterifying one enantiomer of the racemic carboxylic acid at high selectivity, and increasing the amount of esterified carboxylic acid by racemizing the optically active carboxylic acid which is the other enantiomer not used in esterification.
US9315442B2
申请人:——
公开号:US9315442B2
公开(公告)日:2016-04-19
Enantioselective Oxidative Rearrangements with Chiral Hypervalent Iodine Reagents
A stereoselectivehypervalent iodine-promoted oxidative rearrangement of 1,1-disubstituted alkenes has been developed. This practically simple protocol provides access to enantioenriched α-arylated ketones without the use of transition metals from readily accessible alkenes.