作者:Oleg V. Bityukov、Andrey S. Kirillov、Pavel Yu. Serdyuchenko、Maria A. Kuznetsova、Valentina N. Demidova、Vera A. Vil’、Alexander O. Terent'ev
DOI:10.1039/d2ob00343k
日期:——
The electrochemical thiocyanation of barbituricacids with NH4SCN was disclosed in an undivided cell under constant current conditions. The electrosynthesis is the most efficient at a record high current density (janode ≈50–70 mA cm−2). NH4SCN has a dual role as the source of the SCN group and as the electrolyte. Electrochemical thiocyanation of barbituricacids starts with the generation of (SCN)2
巴比妥酸与 NH 4 SCN 的电化学硫氰化反应在恒流条件下的未分隔电池中进行了公开。在创纪录的高电流密度( j阳极≈50–70 mA cm -2)下,电合成效率最高。NH 4 SCN 作为SCN基团的来源和作为电解质具有双重作用。巴比妥酸的电化学硫氰化反应始于 (SCN) 2的生成来自硫氰酸根阴离子。将硫氰加成到巴比妥酸的烯醇互变异构体的双键上,得到硫氰化巴比妥酸。各种具有不同官能团的硫氰化巴比妥酸以 18-95% 的收率获得,并显示出有希望的抗真菌活性。
Iridium supported on porous polypyridine-oxadiazole as high-activity and recyclable catalyst for the borrowing hydrogen reaction
作者:Jiahao Li、Anruo Mao、Wei Yao、Haiyan Zhu、Dawei Wang
DOI:10.1039/d2gc00190j
日期:——
HRTEM, SEM, and XPS, and revealed high catalytic activity for the reaction of dimethyl-6-aminouracil with benzylalcohols, 1,3-dimethylbarbituric acid with benzylalcohols and 2-aminobenzylamine and benzylalcohols through dehydrogenation and the borrowinghydrogenstrategy with alcohol or water as the solvent. In addition, this PPO-Ir catalyst could be recycled and reused without a manifest loss of
Electrochemical Generation of Peroxy Radicals and Subsequent Peroxidation of 1,3-Dicarbonyls in an Undivided Cell
作者:Oleg V. Bityukov、Ksenia V. Skokova、Vera A. Vil’、Gennady I. Nikishin、Alexander O. Terent’ev
DOI:10.1021/acs.orglett.3c03780
日期:2024.1.12
The generation of peroxy radicals from hydroperoxides with subsequent selective peroxidation of 1,3-dicarbonyls in an undivided electrochemical cell under constant current conditions is reported. The method provides a variety of peroxy-containing barbituric acids and 4-hydroxy-2(5H)-furanones with yields of up to 74%. Only the combination of anodic and cathodic processes provides efficient peroxidation
作者:K. A. Krasnov、V. G. Kartsev、A. S. Gorovoi、V. N. Khrustalev
DOI:10.1023/a:1022163710687
日期:——
The three-dimensional structure of 1,3-dirnethyl-5-(4-allyloxybenzyl)-5-cytisylmethylbarbituric acid was found by x-ray structure analysis. A conformation with proximal cytisine and 2,4,6-trioxopyrimidine moieties was observed. Analogous structures for other synthesized 1,3-dimethyl-5-arylmethyl-5-cytisylmethylbarbituric acids and their 2-thio analogs were proved and the intramolecular effects caused by mutual magnetic shielding of spatially proximal groups were studied using PMR.
Chemical modification of plant alkaloids. I. Aminomethylation of barbituric acid derivatives by cytisine
作者:K. A. Krasnov、V. G. Kartsev、A. S. Gorovoi
DOI:10.1007/bf02236429
日期:2000.3
Reaction of cytisine with 1-mono- and 1,3-disubstituted 5-arylmethylbarbituric acids in the presence of formaldehyde results in aminomethylation of C-5 to form the corresponding 5-cytisylmethylbarbituric acids. The structures of the products are found using PMR spectroscopy mid mass spectrometry. 1-Phenyl-5-(2,4-dimethoxybenzyl)-5-cytisylmethylbarbituric acid is obtained as a mixture of two steroisomers in an approximately 2:1 ratio.