Applications of Multicomponent Reactions for the Synthesis of Diverse Heterocyclic Scaffolds
作者:James D. Sunderhaus、Chris Dockendorff、Stephen F. Martin
DOI:10.1021/ol7018357
日期:2007.10.1
process involving sequential reactions of aldehydes, primary amines, acid chlorides, and nucleophiles has been developed to prepare multifunctional substrates that may be employed in subsequent ring-forming reactions to generate a diverse array of functionalized heterocyclic scaffolds. This new approach to diversity-oriented synthesis was then applied to the first total synthesis of the isopavine alkaloid
Multicomponent, Mannich-type assembly process for generating novel, biologically-active 2-arylpiperidines and derivatives
作者:Simon Hardy、Stephen F. Martin
DOI:10.1016/j.tet.2014.06.045
日期:2014.10
A multicomponent, Mannich-type assembly process commencing with commercially available bromobenzaldehydes was sequenced with [3+2] dipolar cycloaddition reactions involving nitrones and azomethine ylides to generate collections of fused, bicyclic scaffolds based on the 2-arylpiperidine subunit. Use of the 4-pentenoyl group, which served both as an activator in the Mannich-type reaction and a readily-cleaved amine protecting group, allowed sub-libraries to be prepared through piperidine N-functionalization and cross-coupling of the aryl bromide. A number of these derivatives displayed biological activities that had not previously been associated with this substructure. Methods were also developed that allowed rapid conversion of these scaffolds to novel, polycyclic dihydroquinazolin-2-ones, 2-imino-1,3-benzothiazinanes, dihydroisoquinolin-3-ones, and bridged tetrahydroquinolines. (C) 2014 Elsevier Ltd. All rights reserved.
Synthesis of diverse heterocyclic scaffolds via tandem additions to imine derivatives and ring-forming reactions
作者:James D. Sunderhaus、Chris Dockendorff、Stephen F. Martin
DOI:10.1016/j.tet.2009.05.009
日期:2009.8
for the efficient syntheses of diverse arrays of heterocycliccompounds. The key elements of the approach comprise a Mannich-type, multicomponent coupling reaction in which functionalized amines, aromatic aldehydes, acylating agents, and π- and organometallic nucleophiles are combined to generate intermediates that are then further transformed into diverseheterocyclic scaffolds via a variety of cyclization