Synthesis of Thiazoles Bearing Aryl Enamine/Aza-enamine Side Chains: Effect of the π-Conjugated Spacer Structure and Hydrogen Bonding on Photophysical Properties
作者:Kseniya I. Lugovik、Aleksandra V. Popova、Alexander K. Eltyshev、Enrico Benassi、Nataliya P. Belskaya
DOI:10.1002/ejoc.201700518
日期:2017.8.2
Abstract: An efficient synthesis of a new series of di- and trisubstituted thiazoles (TZs) bearing aryl enamine side chains (ETZs) was developed, and the optical properties of these compounds were compared with structuralanalogues containing the isoelectronic aza-enamine group (ATZs). Spectral characterization has demonstrated the difference in the absorption and fluorescence of the ETZs and ATZs
Synthesis and physicochemical properties of merocyanine dyes based on dihydropyridine and fragments of cyanoacetic acid derivatives
作者:Irina A. Borisova、Andrey A. Zubarev、Lydmila A. Rodinovskaya、Anatoliy M. Shestopalov
DOI:10.24820/ark.5550190.p009.908
日期:——
Merocyaninedyes of the dihydropyridine series were prepared from salts of α(γ)-picolinium and cyanoaceticacidderivatives. Their spectral characteristics suggesting their structure in solution were studied. The change in the spectral properties depending on the substituents introduced into the structure of the substituents and solvents used (solvatochromism) was considered. The protonation of the
Hishmat, O. H.; Din, A. A. Magd El; Ismail, N. A., Organic Preparations and Procedures International, 1992, vol. 24, # 1, p. 33 - 38
作者:Hishmat, O. H.、Din, A. A. Magd El、Ismail, N. A.
DOI:——
日期:——
Oxidation of 2-cyanoprop-2-enethioamides with hydrogen peroxide
作者:V. V. Dotsenko、S. G. Krivokolysko、S. V. Shishkina、O. V. Shishkin
DOI:10.1007/s11172-012-0291-3
日期:2012.11
Oxidation of (E)-3-aryl-2-cyanoprop-2-enethioamides with 32% H2O2 under mild conditions gave (E)-3-aryl-2-cyano-1-iminioprop-2-ene-1-sulfenates in 70–88% yields. Under the conditions of the Radziszewski reaction (H2O2, 10% aqueous KOH) or upon prolonged treatment with H2O2, (E)-3-aryl-2-cyanoprop-2-enethioamides underwent transformations leading to complex mixtures of oxidation products. In some cases, 3-aryloxirane-2,2-dicarboxamides were isolated from those mixtures in low yields (<20%). Treatment of 3-arylamino-2-cyanoprop-2-enethioamides with the system H2O2/KOH in ethanol afforded (arylaminomethylidene)malononitriles.