Processes for production of alpha-aminooxyketones and alpha-hydroxyketones
申请人:Saito Susumu
公开号:US20070055081A1
公开(公告)日:2007-03-08
The present invention provides a method for easily obtaining α-aminooxyketone compound which is a synthetic equivalent for monosaccharide and pentoses, and a equivalent of α-hydroxyketone compound that can be synthetic intermediates of various physiologically active materials, in high yield; to pave the way for the synthesis of monosaccharide and furthermore of oligosaccharide from the resulting α-hydroxyketone compound induced from α-aminooxyketone compound; and to open new possibilities for the synthesis of various sugar medicines such as anticancer agents, antithrombogenic agents, anti-viral agents, anti-HIV agents, inhibitors of cholesterol synthesis, verotoxin neutralizing agents. According to the invention, a carbonyl compound is allowed to react with a nitroso compound to produce an α-aminooxyketone compound using a catalyst containing a heterocyclic compound shown in the general formula (I) (wherein X1, X2 and X3 independently represent nitrogen, carbon, oxygen or sulfur; and Z represents a substituted or unsubstituted 5- to 10-membered ring).
PROCESSES FOR PRODUCTION OF ALPHA-AMINOOXYKETONES AND ALPHA-HYDROXYKETONES
申请人:Japan Science and Technology Agency
公开号:EP1717221A1
公开(公告)日:2006-11-02
The present invention is to provide a method for easily obtaining α-aminooxyketone compound which is a synthetic equivalent for monosaccharide and pentoses, and a equivalent of α-hydroxyketone compound that can be synthetic intermediates of various physiologically active materials, in high yield; to pave the way for the synthesis of monosaccharide and furthermore of oligosaccharide from the resulting α-hydroxyketone compound induced from α-aminooxyketone compound; and to open new possibilities for the synthesis of various sugar medicines such as anticancer agents, antithrombogenic agents, anti-HIV agents, inhibitors of cholesterol synthesis, verotoxin neutralizing agents. According to the invention, a carbonyl compound is allowed to react with a nitroso compound to produce an α-aminooxyketone compound using a catalyst containing a heterocyclic compound shown in the general formula (I) (wherein X1, X2 and X3 independently represent nitrogen, carbon, oxygen or sulfur; and Z represents a substituted or unsubstituted 5-to 10-membered ring).
Dual-Organocatalyst-Promoted Asymmetric Cascade Reaction: Highly Efficient Construction of Enantiopure Fully Substituted Tetrahydro-1,2-oxazines
作者:Hua Lin、Xing-Wen Sun、Guo-Qiang Lin
DOI:10.1021/ol403463h
日期:2014.2.7
A four-component asymmetric α-aminoxylation/aza-Michael/Mannich cascade reaction for the construction of fully substituted chiral tetrahydro-1,2-oxazine derivatives was accomplished in high yields with excellent enantio- and diastereoselectivities under mild conditions. The 1,2-oxazine derivative could be transformed to the corresponding multifunctional chiral amino alcohol by N–O cleavage and fused-tricyclic