申请人:Nanyang Technical University
公开号:US08273901B2
公开(公告)日:2012-09-25
Disclosed is a process of forming a pyrrole compound. The process comprises contacting an α-carbonyl oxime compound 1
and an α,β-unsaturated aldehyde 2
R1 and R2 in compound 1 are independently selected from the group consisting of H, a silyl-group, an aliphatic group, an alicyclic group, an aromatic group, an arylaliphatic group, and an arylalicyclic group. The aliphatic, alicyclic, aromatic, arylaliphatic, and arylalicyclic groups comprise 0 to about 3 heteroatoms selected from the group N, O, S, Se and Si. R3 in aldehyde 2 is selected from the group consisting of H, a silyl-group, an aliphatic group, an alicyclic group, an aromatic group, an arylaliphatic group, and an arylalicyclic group. The aliphatic, alicyclic, aromatic, arylaliphatic, and arylalicyclic groups comprise 0 to about 3 heteroatoms selected from the group N, O, S, Se and Si. The α-carbonyl oxime compound 1 an the α,β-unsaturated aldehyde 2 are contacted in a suitable solvent in the presence of a secondary amine. The compounds are contacted for a sufficient period of time to allow the formation of an N-hydroxypyrrole compound 3
本发明涉及一种制备吡咯化合物的方法。该方法包括将α-羰基肟化合物1和α,β-不饱和醛2进行接触,其中化合物1中的R1和R2独立地选自H、硅基团、脂肪基、脂环基、芳香基、芳基脂肪基和芳基脂环基。脂肪、脂环、芳香、芳基脂肪和芳基脂环基包括0到约3个来自N、O、S、Se和Si的杂原子。醛2中的R3选自H、硅基团、脂肪基、脂环基、芳香基、芳基脂肪基和芳基脂环基。脂肪、脂环、芳香、芳基脂肪和芳基脂环基包括0到约3个来自N、O、S、Se和Si的杂原子。在适当的溶剂中,在次级胺的存在下,将α-羰基肟化合物1和α,β-不饱和醛2进行接触。化合物进行接触的时间足够长,以允许形成N-羟基吡咯化合物3。