Useful four-carbon synthons en route to monastrol analogs
作者:Amr M. Abdou、S. Botros、Rasha A. Hassan、Mona M. Kamel、Douglass F. Taber、Azza T. Taher
DOI:10.1016/j.tet.2014.11.022
日期:2015.1
A simple protocol has been established for the preparation of a family of crystalline N-aryl γ-hydroxycrotonamides, useful four-carbon synthons. These were further elaborated to analogs of monastrol having variant ester sidechains, that were evaluated for their anticancer activity employing the NCI 60 cell line panel.
Exploring the Scope of Tandem Palladium and Isothiourea Relay Catalysis for the Synthesis of α-Amino Acid Derivatives
作者:Jacqueline Bitai、Alexandra M. Z. Slawin、David B. Cordes、Andrew D. Smith
DOI:10.3390/molecules25102463
日期:——
allylic phosphate precursor. This method uses readily accessible N,N-dimethylglycine aryl esters and functionalized allylic phosphates, forming quaternary ammonium salts in situ in the presence of a palladium catalyst. Subsequent enantioselective [2,3]-sigmatropic rearrangement, promoted by the chiral isothiourea tetramisole, generates α-aminoacidderivatives with two contiguous stereocenters. The incorporation