A convenient electro-catalyzed multicomponent synthesis of 4H-thiopyran derivatives
作者:Rahul Dubey、Vinay K. Singh、Laxmi Kant Sharma、Abhishek Upadhyay、Narendra Kumar、Rana Krishna Pal Singh
DOI:10.1039/c7nj01211j
日期:——
An environmentally benign synthesis of substituted 4H-thiopyrans was carried out by the condensation of aromatic aldehydes, malononitrile, carbon disulfide and primary amines. Constant potential electro synthesis was carried out in an undivided cell at room temperature in the presence of lithium perchlorate as a supporting electrolyte. Clean synthesis, use of electricity instead of chemical reagents
Transformation of 4-aryl(heteryl)-2,6-diamino-3,5-dicyano-4H-thiopyrans into substituted acrylonitriles, 1,4-dihydropyridines, 2,3,4,7-tetrahydrothiazolo[3,2-a]pyridine, and 4,7-dihydrothieno[2,3-b]pyridine
作者:V. D. Dyachenko
DOI:10.1134/s1070428006050137
日期:2006.5
Cross-recyclization of 4-aryl(heteryl)-2,6-diamino-3,5-dicyano-4H-thiopyrans with alpha-bromoketones or alkyl halides formed substituted 3 -aryl-2-(4-R-thiazol-2-yl)acrylonitriles, 2-alkylsulfanyl-1,4-dihydropyridines, 2,3,4,7-tetrahydrothiazolo[3,2-a]pyridine, and 4,7-dihydrothieno[2,3-b]pyridine.
Multicomponent Synthesis of 4-Alkyl(Aryl, Hetaryl)-2-alkoxycarbonyl(aroyl, carbamoyl)- 3,6-diamino-5-cyanothieno[2,3-b]pyridines
作者:I. V. Dyachenko、V. D. Dyachenko、P. V. Dorovatovskii、V. N. Khrustalev、V. G. Nenajdenko
DOI:10.1134/s1070428018100019
日期:2018.10
The condensation of malononitrile with hydrogen sulfide and aldehydes in the presence of triethylamine in ethanol at room temperature afforded 4-alkyl(aryl, hetaryl)-2,6-diamino-3,5-dicyano-4H-thiopyrans. Treatment of the latter in situ with alkali in DMF, followed by addition of an alkylating agent, led to the formation of 4-alkyl(aryl, hetaryl)-2-alkoxycarbonyl(aroyl, carbamoyl)-3,6-diamino-5-cyanothieno[2
在三乙胺的存在下,室温下丙二腈与硫化氢和醛的缩合,得到4-烷基(芳基,杂芳基)-2,6-二氨基-3,5-二氰基-4 H-硫代吡喃。后者在DMF中用碱原位处理,然后添加烷基化剂,导致形成4-烷基(芳基,杂芳基)-2-烷氧基羰基(芳酰基,氨基甲酰基)-3,6-二氨基-5-基氰基噻吩并[2,3- b ]-吡啶。
Dyachenko; Litvinov, Russian Journal of Organic Chemistry, 1998, vol. 34, # 4, p. 557 - 563