Synthesis of pyrrole- and indole-containing nitropropanoates on the basis of β-heteryl-α-nitroacrylates
摘要:
Synthetic approach to beta-furyl- and beta-thienyl-alpha-nitroacrylates was modified. It was established that these nitroethenes react with pyrrole, N-methylpyrrole, and substituted indole derivatives in the absence of catalyst to afford products of the alkylation of pyrrole C-2 and indole C-3 reaction sites. A possibility of this reaction to proceed under "dry reaction" condition on a silicagel surface was shown.
Efficient one-pot methods for the synthesis of variously functionalised conjugated nitroalkenes have been reported. Despite the utility in different fields of these compounds, only a few multi-step syntheses have been reported in the literature, giving the target compounds in low overall yields. α-Nitro acrylates or cinnamates, α-nitro α,β-unsaturated ketones and, most importantly, aromatic and heteroaromatic
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
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.
Study of geometric isomerism of ethyl β-aryl(hetaryl)-α-nitroacrylates by 1H NMR spectroscopy method
作者:R. I. Baichurin、D. B. Berestovitskaya、L. V. Baichurina、N. I. Aboskalova、V. M. Berestovitskaya
DOI:10.1134/s1070363216010102
日期:2016.1
furyl and thienyl heteroanalogs depending on the nature of the substituent in the β-position of α-nitroacrylates, deuterated solvent and duration of exposure of the sample were studied by means of 1H NMR spectroscopy.
根据α-硝基丙烯酸酯的β位上取代基的性质,氘代溶剂和样品的暴露时间,研究了α-硝基肉桂酸乙酯的Z → E异构化及其呋喃基和噻吩基杂类似物的特征。1 H NMR光谱。
Palladium-Catalyzed Intramolecular Cyclization of Nitroalkenes: Synthesis of Thienopyrroles
作者:Mohamed A. EL-Atawy、Francesco Ferretti、Fabio Ragaini