First report of the application of simple molecular complexes as organo-catalysts for Knoevenagel condensation
作者:Sumit Kumar Panja、Nidhi Dwivedi、Satyen Saha
DOI:10.1039/c5ra09036a
日期:——
Knoevenagel condensation is used to synthesize a series of important cyano group containing synthetic precursors for synthesis of biologically active molecules at RT using a minimum amount of catalyst (∼5 mol%) without the need for chromatographic separation techniques. Detailed mechanistic studies and substituenteffects of aromaticaldehydes on the reaction have been investigated. In addition, biologically
Electrocatalytic chain transformation of salicylaldehyde and CH acids into substituted 4H-chromenes
作者:S. K. Feducovich、M. N. Elinson、A. S. Dorofeev、S. V. Gorbunov、R. F. Nasybullin、N. O. Stepanov、G. I. Nikishin
DOI:10.1007/s11172-008-0093-9
日期:2008.3
Electrochemically initiated catalytic chain transformation of salicylaldehydes and CH acids containing the cyano group in an ethanolicsolution in an undivided cell produced substituted 4H-chromenes in 85–95% yields.
Aegle marmelos in heterocyclization: greener, highly efficient, one-pot three-component protocol for the synthesis of highly functionalized 4H-benzochromenes and 4H-chromenes
作者:Sachin Shinde、Shashikant Damate、Smita Morbale、Megha Patil、Suresh S. Patil
DOI:10.1039/c6ra28779d
日期:——
A facile, one-potthree-component protocol for the synthesis of 2-amino-4H-chromene derivatives has been demonstrated using Bael Fruit Extract (BFE) as a natural catalyst in a green reaction medium. This method offers a mild, efficient and highly economical protocol since the reaction proceeds in natural BFE-catalyst at room temperature under aerobic conditions with a very short reaction time (30 min)
Choice of Solvent in the Synthesis of Chromeno[3,4-<i>c</i>]pyridines and Chromene-3-carboxylates
作者:Mansing M. Mane、Suyog N. Korade、Sarika M. Chinchkar、Dattaprasad M. Pore
DOI:10.1080/00304948.2018.1468989
日期:2018.7.4
variety of condensation procedures have been used for the synthesis of chromenopyridine derivatives. Marta Costa reported a two component method for synthesis of 4amino-2-hydroxy-5-methylidene-5H-chromeno [3,4-c]pyridine-1-carbonitriles (4) from 2-oxo-2H-1-benzopyran-3-carbonitrile and cyanoacetamide in the presence of triethylamine, which were active at adenosine receptors. O’Callaghan and co-workers carried
Electrochemically induced chain transformation of salicylaldehydes and alkyl cyanoacetates into substituted 4H-chromenes
作者:Michail N. Elinson、Alexander S. Dorofeev、Sergey K. Feducovich、Sergey V. Gorbunov、Ruslan F. Nasybullin、Nikita O. Stepanov、Gennady I. Nikishin
DOI:10.1016/j.tetlet.2006.08.053
日期:2006.10
Electrolysis of salicylaldehydes and alkyl cyanoacetates in ethanol in an undivided cell in the presence of sodium bromide results in the formation of substituted alkyl 2-amino-4-(1-cyano-2-alkoxy-2-oxoethyl)-4H-chromene-3-carboxylates in 85-95% yields. (c) 2006 Elsevier Ltd. All rights reserved.