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
Photolysis of the 2-tetrazene gives the triazole by homolysis of one single N,N-bond. The formation of the other products – can be rationalized by regarding the aza-allyl radical as a common precursor.
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.