starting from α,β-unsaturatednitrones has been achieved. The nucleophilic addition of dimethylsulfoxonium methylide to the C═Nbond of an α,β-unsaturatednitrone to form an aziridine N-oxide followed by the Meisenheimer rearrangement affords 3,6-dihydro-2H-1,2-oxazine in up to 70% yield. Methylene was confirmed to be incorporated at the C3 position of the ring. A wide range of β-aryl-substituted α,β-unsaturated
从α,β-不饱和的硝酮开始,独特而有效地形成了3,6-二氢-2 H -1,2-恶嗪。二甲亚砜基亚甲基的亲核加成,形成一个α,β-不饱和硝酮的C═N键,形成氮丙啶N-氧化物,然后进行迈森海默重排,得到3,6-二氢-2 H -1,2-恶嗪产率70%。证实在环的C 3位置结合了亚甲基。广泛的β-芳基取代的α,β-不饱和硝酮可用于该反应。
Organocatalytic Asymmetric Michael-Hemiacetalization Reaction Between 2-Hydroxyacetophenones and Enals: A Route to Chiral β,γ-Disubstituted γ-Butyrolactones
作者:Megha Balha、Buddhadeb Mondal、Subas Chandra Sahoo、Subhas Chandra Pan
DOI:10.1021/acs.joc.7b00363
日期:2017.6.16
The first highlyenantioselective organocatalytic reaction employing 2-hydroxyacetophenones is disclosed, namely Michael-hemiacetalization reaction of 2-hydroxyacetophenones with enals. The combination of a primaryamine and a secondaryaminecatalyst was found to be the best choice for this methodology. The products of this reaction were obtained in high enantio- and diastereoselectivities and were
1,3-Diarylprop-2-en-1-ones, compositions containing them and use thereof
申请人:AVENTIS PHARMA S.A.
公开号:US20030153611A1
公开(公告)日:2003-08-14
1,3-Diarylprop-2-en-1-ones and derivatives, compositions containing them, manufacturing process and use. Substituted 1,3-diarylprop-2-en-1-ones with therapeutic activity may be used in oncology.
1,3-DIARYLPROP-2-EN-1-ONES, COMPOSITIONS CONTAINING THEM AND USE THEREOF
申请人:Aventis Pharma S.A.
公开号:US20040147584A2
公开(公告)日:2004-07-29
Abstract of the Disclosure
1,3-Diarylprop-2-en-1-ones and derivatives, compositions containing them, manufacturing process and use. Substituted 1,3-diarylprop-2-en-1-ones with therapeutic activity may be used in oncology.
Development of Fluorogenic Substrates For Monoamine Oxidases (Mao-A and Mao-B)
申请人:Chen Gong
公开号:US20080194522A1
公开(公告)日:2008-08-14
The present invention relates to compounds useful for detecting the activity of monoamine oxidases, compounds useful for competitively inhibiting monoamine oxidases, for determining inhibitors of monoamine oxidases and compounds useful for treating monoamine oxidase-related nervous system pathologies, as well as pharmaceutical compositions and methods of manufacture thereof.