3-Aryl-4-Isoquinolinone Derivatives An Efficient Oxidative Preparation
摘要:
A comparative study of the oxidation of 3-aryl-4-hydroxytetrahydroisoquinolines has been carried out. A modification of the Jones conditions turn out to be the best methodology for the regioselective preparation of target 4-isoquinolinone derivatives.
Reaction of Allylzinc Reagents and Zinc Enolates of Ketones with α-Amidoalkylphenyl Sulfones
作者:Marino Petrini、Roberto Profeta、Paolo Righi
DOI:10.1021/jo025606f
日期:2002.6.1
Alpha-amidoalkylphenyl sulfones behave as N-acylimino equivalents in the reaction with functionalized allylzinc reagents. The addition products obtained using the zinc derivative of ethyl 2-(bromomethyl)acrylate can be readily transformed into alpha-methylene-gamma-lactams using different cyclization procedures. The allylzinc reagent obtained from 3-bromo-1-acetoxy-1-propene directly affords protected
Discovery of quinuclidine modulators of cellular progranulin
作者:James C. Lanter、Angela Y.-P. Chen、Toni Williamson、Gerhard Koenig、Jean-François Blain、Duane A. Burnett
DOI:10.1016/j.bmcl.2021.128209
日期:2021.9
Phenotypic screening of an annotated smallmolecule library identified the quinuclidine tetrahydroisoquinoline solifenacin (1) as a robust enhancer of progranulin secretion with single digit micromolar potency in a murine microglial (BV-2) cell line. Subsequent SAR development led to the identification of 29 with a 38-fold decrease in muscarinic receptor antagonist activity and a 10-fold improvement
Synthesis of an apiose-containing disaccharide fragment of rhamnogalacturonan-II and some analogues
作者:Anne-Laure Chauvin、Sergey A. Nepogodiev、Robert A. Field
DOI:10.1016/j.carres.2003.09.031
日期:2004.1
3-O-isopropylidene-beta-D-erythrofuranoside and methyl 2,3-O-isopropylidene-beta-D-ribofuranoside was achieved using 4-O-acetyl-2,3-O-carbonyl-alpha-L-rhamnopyranosyl bromide and Ag2O as a promoter. Deprotected disaccharides beta-L-Rhap-(1-->3')-beta-D-Apif-OMe and beta-L-Rhap-(1-->3')-beta-D-Ribf-OMe were compared to their alpha-rhamnosyl isomers which were prepared using conventional Helferich glycosylation.
作者:Michael T. Davenport、Jordan A. Dickson、Matthew R. Johnson、Stephen Chamberland
DOI:10.1021/acs.jnatprod.9b00813
日期:2019.11.22
The first totalsynthesis of clavatadine B (2), a natural product found to be a selective human blood coagulation factor XIa inhibitor, is described. A convergent approach that exemplifies the advantages of direct, early stage guanidinylation provided an immediate clavatadine B precursor, which was assembled in an efficient manner using known synthetic precursors of the structurally related natural