614-16-4Relevant articles and documents
Synthesis, ellipsometry and non-linear optical features of substituted 1,3,5-triphenylpyrazolines
Gondek, Ewa,Nizio?, Jacek,Danel, Andrzej,Kucharek, Mateusz,J?dryka, Jaros?aw,Karasiński, Pawe?,Nosidlak, Natalia,Fedorchuk, Andrij A.
, p. 741 - 745 (2019)
Ellipsometric and nonlinear optical properties of new, differently substituted, 1,3,5-triphenylpyrazolines dyes, were studied. Results of theoretical calculation within a framework of density functional theory (DFT) technique were verified by spectroscopic ellipsometry and optical second harmonic generation (SHG) experiment at fundamental laser wavelength 1064 nm. Absorption bands and complex refractive indices were determined. Principal role of 2-thienyl substituent for first order nonlinear optical properties was demonstrated.
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Salvatori
, p. II, 287 (1891)
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From Stoichiometric Reagents to Catalytic Partners: Selenonium Salts as Alkylating Agents for Nucleophilic Displacement Reactions in Water
Martins, Nayara Silva,ángel, Alix Y. Bastidas,Anghinoni, Jo?o M.,Lenard?o, Eder J.,Barcellos, Thiago,Alberto, Eduardo E.
supporting information, p. 87 - 93 (2021/11/03)
The ability of chalcogenium salts to transfer an electrophilic moiety to a given nucleophile is well known. However, up to date, these reagents have been used in stoichiometric quantities, producing a substantial amount of waste as byproducts of the reaction. In this report, we disclose further investigation of selenonium salts as S-adenosyl-L-methionine (SAM) surrogates for the alkylation of nucleophiles in aqueous solutions. Most importantly, we were able to convert the stoichiometric process to a catalytic system employing as little as 10 mol % of selenides to accelerate the reaction between benzyl bromide and other alkylating agents with sodium cyanide in water. Probe experiments including 77Se NMR and HRMS of the reaction mixture have unequivocally shown the presence of the selenonium salt in the reaction mixture. (Figure presented.).
Deadly KCN and pricey metal free track for accessing β-ketonitriles employing mild reaction conditions
Sharma, Pawan K.,Kumar, Rajiv,Ram, Sita,Chandak, Navneet
supporting information, p. 1847 - 1856 (2021/04/26)
A one pot synthesis of β-ketonitriles from readily accessible 3-chloropropenals using economically benign iodine, aqueous ammonia and sodium hydroxide solution, employing mild reaction conditions have been described. This report presents a convenient, inexpensive, highly toxic-matter-free and eco-friendly approach for β-ketonitriles.