Model Studies on the Synthesis of Madangamine Alkaloids. Assembly of the Macrocyclic Rings
摘要:
Using simplified model derivatives, the assembly of the macrocyclic rings of madangamines, including the 13- and 14-membered D rings of madangamlnes C-E, the all-cis-triunsaturated 15-membered D ring of madangamine A, and the (Z,Z)-unsaturated 11-membered E ring common to madangamines A-E, has been studied.
[EN] SUBSTITUTED PYRAZOLE COMPOUNDS AS SERINE PROTEASE INHIBITORS<br/>[FR] COMPOSÉS PYRAZOLE SUBSTITUÉS À UTILISER EN TANT QU'INHIBITEURS DE SÉRINE PROTÉASE
申请人:VERSEON CORP
公开号:WO2016138532A1
公开(公告)日:2016-09-01
There are provided inter alia multisubstituted aromatic compounds useful for the inhibition of thrombin and/or kallikrein, which compounds include substituted pyrazolyl. There are additionally provided pharmaceutical compositions. There are additionally provided methods of treating and preventing certain diseases or disorders, which diseases or disorders are amenable to treatment or prevention by the inhibition of thrombin and/or kallikrein.
Catalytic Chemo- and Regioselective Coupling of 1,3-Dicarbonyls with <i>N</i>-Heterocyclic Nucleophiles
作者:Miles Kenny、Daniel J. Kitson、Vilius Franckevičius
DOI:10.1021/acs.joc.6b00731
日期:2016.6.17
compounds with indole, pyrrole, imidazole, and pyrazole nucleophiles via an allylic linker under neutral conditions is disclosed. This process enables the installation of an all-carbon quaternary center and new C–C and C–N bonds in a single operation. Despite the weakly acidic nature of N-heterocycles, the reactions proceed with good efficiency and complete regio- and chemoselectivity.
A diastereoselective conjugate addition of an organocopper reagent to a chiral racemic olefinic amido ester has been used as the key step in a formal total synthesis of paroxetine.
有机铜试剂向手性外消旋烯烃酰胺基酯的非对映选择性共轭加成已被用作帕罗西汀的正式总合成中的关键步骤。
An economical approach for peptide synthesis<i>via</i>regioselective C–N bond cleavage of lactams
作者:Wataru Muramatsu、Hisashi Yamamoto
DOI:10.1039/d2sc01466a
日期:——
An economical, solvent-free, and metal-free method for peptidesynthesis via C–N bond cleavage using lactams has been developed. The method not only eliminates the need for condensation agents and their auxiliaries, which are essential for conventional peptidesynthesis, but also exhibits high atom economy. The reaction is versatile because it can tolerate side chains bearing a range of functional