Aminoenylesters. I. A New Synthesis of 1,2,3,4-Tetrahydropyrimidines by Heterocyclic Annelation Reactions of Aminoenylesters with Primary Amines and Acetaldehyde.
Development of small-molecule P-gp inhibitors of the N-benzyl 1,4-dihydropyridine type: Novel aspects in SAR and bioanalytical evaluation of multidrug resistance (MDR) reversal properties
Novel series of N-benzyl 1,4-dihydropyridines have been prepared by facilesyntheses. All relevant substituents of the molecular scaffold have been varied. The resulting compounds were biologically evaluated as P-glycoprotein (P-gp) inhibitors. Substitutions of the N-benzyl residue favour biological activity beside respective 3-ester functions. Most active compounds were further evaluated as multidrug
Organocatalyzed regioselective and enantioselective synthesis of 1,4- and 1,2-dihydropyridines
作者:Truong-Giang Le、Hoai-Thu Pham、James P. Martin、Isabelle Chataigner、Jean-Luc Renaud
DOI:10.1080/00397911.2020.1778034
日期:2020.9.1
first examples of asymmetric organocatalyzed synthesis of 1,2-dihydropyridines, affording enantioselective access to and partially solving regioselectivity challenges in the synthesis of dihydropyridines. We demonstrate that through modification of organocatalysts both 1,2- and 1,4-dihydropyridines (1,2- and 1,4-DHPs) can be obtained with high regioselectivity (ratio of 1,2-DHP/1,4-DHP from 95/5 to 0/100)
Organocatalyzed synthesis and biological activity evaluation of hybrid compounds 4<i>H</i>-pyrano[2,3-<i>b</i>]pyridine derivatives
作者:Hoai-Thu Pham、James P. Martin、Truong-Giang Le
DOI:10.1080/00397911.2020.1757717
日期:2020.6.17
pharmaceutical compounds. Dihydropyridines are well-known moieties in compounds that have analgesic, fungicidal, and antibacterial activities and 4H-pyran structures are populous in compounds with antibacterial and anti-cancer potential; exploiting the biologicalactivities of both 1,4-dihydropyridines and 4H-pyran moieties through the exploration of hybrid compounds featuring combinations of these two
A facile one-pot domino reaction for the stereoselective synthesis of acryl derivatives promoted by Ca(OTf)2
作者:Srinivasarao Yaragorla、Pyare Lal Saini、Abhishek Pareek、Abdulrahman I. Almansour、Natarajan Arumugam
DOI:10.1016/j.tetlet.2016.03.098
日期:2016.5
A facile one-pot domino reaction for the stereoselectivesynthesis of acryl derivatives has been reported using alkaline earth catalyst [Ca(OTf)2]. Initially aryl amine reacts with ethyl propiolate to form β-enamino ester which further reacts with aryl aldehyde and indole in the presence of Ca(OTf)2 to give indolyl acrylates. It is interesting to note that in the absence of indole the reaction leads
Multi-Component Reaction of Amines, Alkyl Propiolates, and Ninhydrin: An Efficient Protocol for the Synthesis of Tetrahydro-dihydroxy-oxoindeno[1,2-<i>b</i>]pyrrole Derivatives
A new protocol for the synthesis of a series of tetrahydrodihydroxy-oxoindeno[1,2-b]pyrrolefrom simple primaryamines, alkyl propiolates, and ninhydrin was developed. The key step in the synthesis is an efficient three-component reaction of an amine with an alkyl propiolate to give a 3-amino acrylate derivative, which then reacts with ninhydrin.