OPTICALLY ACTIVE ALPHA-AMINOOXYKETONE DERIVATIVES AND PROCESS FOR PRODUCTION THEREOF
申请人:Tokyo University of Science
公开号:EP1661885A1
公开(公告)日:2006-05-31
The corresponding α-aminooxy ketone is manufactured with a high yield and a high enantioselectivity. A manufacturing method for an optically active α-aminooxy ketone derivative expressed by formula (1), wherein a ketone expressed by formula (2) is caused to react with a nitroso compound expressed by formula (3) in the presence of a proline derivative expressed by formula (4).
In the formula, R1 and R2 respectively denote an alkyl, alkenyl or alkynyl group, and R1 and R2 may be linked to form a ring. R3 denotes an aryl, heterocyclic, alkyl, alkenyl or alkynyl group. A denotes a hydrogen atom, alkoxy group, aryloxy group, acyloxy group or silyloxy group which may have a substituent.
Optically active alpha-aminooxyketone derivatives and process for production thereof
申请人:Hayashi Yujiro
公开号:US20060293525A1
公开(公告)日:2006-12-28
The corresponding α-aminooxy ketone is manufactured with a high yield and a high enantioselectivity. A manufacturing method for an optically active α-aminooxy ketone derivative expressed by formula (1), wherein a ketone expressed by formula (2) is caused to react with a nitroso compound expressed by formula (3) in the presence of a proline derivative expressed by formula (4).
In the formula, R
1
and R
2
respectively denote an alkyl, alkenyl or alkynyl group, and R
1
and R
2
may be linked to form a ring. R
3
denotes an aryl, heterocyclic, alkyl, alkenyl or alkynyl group. A denotes a hydrogen atom, alkoxy group, aryloxy group, acyloxy group or silyloxy group which may have a substituent.
US7279601B2
申请人:——
公开号:US7279601B2
公开(公告)日:2007-10-09
Direct Proline-Catalyzed Asymmetric α-Aminoxylation of Aldehydes and Ketones
The direct proline-catalyzedasymmetric α-aminoxylation of aldehydes and ketones has been developed using nitrosobenzene as an oxygen source, affording α-anilinoxy-aldehydes and -ketones with excellent enantioselectivity. Reaction conditions have been optimized, and low temperature (−20 °C) was found to be a key for the successful α-aminoxylation of aldehydes, while slow addition of nitrosobenzene