Features of the reactions of β-aryl(heteryl)-α-nitroacrylates with N,N-, N,O-, and N,S-binucleophiles
作者:L. V. Baichurina、R. I. Baichurin、M. V. Filippenko、N. I. Aboskalova、V. M. Berestovitskaya
DOI:10.1134/s1070363212080117
日期:2012.8
regiospecifically through the initial formation of the AdN products, among which only the product from o-aminothiophenol was isolated. The conditions of converting the S-adducts into 2-aryl(heteryl)benzothiazole were found. The N-adducts formed in the reaction with hydrazine, o-phenylenediamine, and o-aminophenol undergo immediately the spontaneous transformation into the linear (azine, azomethine) or heterocyclic
The synthesis of five-membered rings using fluoromethylene transfer chemistry is an attractive method for building fluorinated products of high value. This work demonstrates for the first time that one-fluorine-one-carbon modification of a substrate could be a viable strategy to access monofluorinated five-membered rings. The synthetic methodology was developed to access monofluorinated isoxazoline-N-oxides
Reactions of 1-amino-2-nitroguanidine with 2-aryl(hetaryl)-1-nitro-1-ethoxycarbonyl(benzoyl)ethenes
作者:T. P. Efimova、O. Yu. Ozerova、T. A. Novikova、R. I. Baichurin、V. M. Berestovitskaya
DOI:10.1134/s1070363214080088
日期:2014.8
Reactions of 1-amino-2-nitroguanidine with 2-aryl(hetaryl)-1-nitro-1-ethoxycarbonyl(benzoyl)-ethenes proceed via initial formation the aza-Michael product, are accompanied by liberation of nitroacetic ester (or nitroacetophenone), and result in N-aryl(hetaryl)methylidene-N-(2-nitroguanidino)amines.
Ethyl α-Nitrocinnamates in the Synthesis of Highly Functionalized Isoxazoles
作者:Kuang-Po Chen、Yu-Jyun Chen、Che-Ping Chuang
DOI:10.1002/ejoc.201000401
日期:2010.9
An effective method for the synthesis of highlyfunctionalizedisoxazoles from readily available starting ethylα-nitrocinnamates has been developed. Ethylα-nitrocinnamates react smoothly with α-nitro carbonyl compounds to produce isoxazoles in good yields. Michael addition of pyridinium ylides to ethylα-nitrocinnamates can also produce these isoxazoles effectively. These pyridinium salts can be
The stereoselective oxy-Michael addition of the 'naked' anion of (S)-6-methyl tetrahydropyran-2-ol to α-nitro-α,β-unsaturated esters followed by reduction and in situ protection of the corresponding amine provides a new and efficient route to protected β-aryl-β-hydroxy-a-amino acids.