Scope and Applicability of an Expedient Synthesis Leading to Polysubstituted 3‐(Carboxyphenyl)pyrroles
作者:Thomas Ullrich、Michael Ghobrial、Klaus Weigand、Andreas L. Marzinzik
DOI:10.1080/00397910701198898
日期:2007.4.1
Abstract A convenient three‐step route toward a functionalized pyrrole building block for novel anti‐inflammatory agents is reported. In contrast to previous strategies, the present approach focuses on inexpensive starting materials and application on a multigram scale. A high degree of functional diversity is demonstrated in various derivatives, and the scope and limitations of this route are discussed
INDAZOLE DERIVATIVES USEFUL AS GLUCAGON RECEPTOR ANTAGONISTS
申请人:Janssen Pharmaceutica NV
公开号:US20180065955A1
公开(公告)日:2018-03-08
The present invention is directed to indazole derivatives, pharmaceutical compositions containing them and their use in the treatment and/or prevention of disorders and conditions ameliorated by antagonizing one or more glucagon receptors, including for example metabolic diseases such as Type II diabetes mellitus and obesity.
Peptido-organic Diels–Alder reactions on hydrophilic resin: scope for combinatorial chemistry
作者:Anette Graven、Morten Meldal
DOI:10.1039/b103765j
日期:2001.11.29
A simple route to activated dienes generated from enone precursors at the N-terminal of immobilised dipeptides is described. The dienes are subjected to reaction with a maleimide dieneophile containing a protected amino functionality for continued peptide synthesis. The reactions are pure and quantitative with dienes generated at the N-terminal of a variety of different dipeptides, including substrates
Morpholinium Trifluoroacetate-Catalyzed Aldol Condensation of Acetone with both Aromatic and Aliphatic Aldehydes
作者:Kristina Zumbansen、Arno Döhring、Benjamin List
DOI:10.1002/adsc.200900902
日期:——
We report a highly efficient, general and practical method for the aldolcondensation of acetone with aromatic and aliphatic aldehydes, using morpholinium trifluoroacetate as a catalyst.
A Promiscuous De Novo Retro-Aldolase Catalyzes Asymmetric Michael Additions via Schiff Base Intermediates
作者:Xavier Garrabou、Tobias Beck、Donald Hilvert
DOI:10.1002/anie.201500217
日期:2015.5.4
enzymes for a range of mechanistically distinct reactions. Here we show that the rudimentary activesites of these catalysts can give rise to useful chemical promiscuity. Specifically, RA95.5‐8, designed and evolved as a retro‐aldolase, also promotes asymmetric Michael additions of carbanions to unsaturated ketones with high rates and selectivities. The reactions proceed by amine catalysis, as indicated by