Method for the in situ preparation of chiral compounds derived from oxazaborolidine-borane complexes which are used in asymmetric reduction reactions
申请人:Burgos Alain
公开号:US20070055068A1
公开(公告)日:2007-03-08
A process for the in situ preparation of chiral compounds derived from oxazaborolidine-borane complexes, wherein a metal borohydride, a Lewis base and an inorganic acid ester are brought together and an optically active amino alcohol and optionally a halide are then added. The compound obtained is a complex that is useful as a catalyst in asymmetric reduction reactions. The reaction is performed by adding the substance to be reduced, particularly prochiral ketones or ether oximes, in order to synthesize chiral alcohols or chiral amines.
ALKALOID AMINOESTER DERIVATIVES AND MEDICINAL COMPOSITION THEREOF
申请人:Caligiuri Antonio
公开号:US20100173880A1
公开(公告)日:2010-07-08
Alkaloid aminoester compounds which act as muscarinic receptor antagonists are useful for the prevention and/or treatment of a broncho-obstructive or inflammatory diseases.
Alkaloid aminoester derivatives and medicinal composition thereof
申请人:Caligiuri Antonio
公开号:US08455646B2
公开(公告)日:2013-06-04
Alkaloid aminoester compounds which act as muscarinic receptor antagonists are useful for the prevention and/or treatment of a broncho-obstructive or inflammatory diseases.
Processes for preparing optically active alcohols and optically active amines
申请人:SUMITOMO CHEMICAL COMPANY, LIMITED
公开号:EP0736509A2
公开(公告)日:1996-10-09
A process for preparing an optically active alcohol by reacting a prochiral ketone corresponding to the optically active alcohol and an acid with a mixture of (1) a boron-containing compound selected from the group consisting of i) a borane compound which is obtained from an optically active β-aminoalcohol and a boron hydride; or obtained from the optically active β-aminoalcohol, a metal borohydride and an acid and ii) an optically active oxazaborolidine and (2) a metal borohydride; and a process for preparing an optically active amine by reacting an oxime derivative and an acid with a mixture of (1) a boron-containing compound selected from the group consisting of i) a borane compound which is obtained from an optically active β-aminoalcohol and a boron hydride, or obtained from said optically active β-aminoalcohol, a metal borohydride and an acid and ii) an optically active oxazaborolidine, and (2) a metal borohydride.