Synthesis of N-aryl indole-2-carboxylates via an intramolecular palladium-catalysed annulation of didehydrophenylalanine derivatives
摘要:
Nitrogen substituted indole-2-carboxylates can be prepared via an intramolecular palladium-catalysed amination reaction of didehydrophenylalanine derivatives using PdCl2(dppf) and KOAc in DMF at 90 degrees C to form the indole nucleus. The specific formation of (Z)-isomers from Horner-Wadsworth-Emmons reaction of phosphonylglycinates and 2-iodobenzaldehydes was crucial to the success of the process, The product N-substituted indole-2-carboxylates were isolated in high yield. (C) 2000 Elsevier Science Ltd, Ail rights reserved.
[EN] INHIBITORS OF HCV NS5B POLYMERASE<br/>[FR] INHIBITEURS DE LA POLYMERASE NS5B DU VHC
申请人:UPJOHN CO
公开号:WO2004002977A1
公开(公告)日:2004-01-08
The present invention porivdes compounds of Formula I, compositons and methods that are useful for treating viral infections and associated diseases, particularly HCV infections and associated diseases.
Stereocontrolled Total Synthesis of (−)-Kaitocephalin
作者:Rishi G. Vaswani、A. Richard Chamberlin
DOI:10.1021/jo702329z
日期:2008.3.1
scalable synthetic route profits from the strategic utilization of substrate-controlled manipulations for the iterative installation of the requisite stereogenic centers. The key transformations include a diastereoselective modified Claisen condensation, a chemo- and diastereoselective reduction of a β-ketoester, and the substrate-directed hydrogenation of a dehydroamino ester derivative. During the course
Conotoxin analogues and methods for synthesis of intramolecular dicarba bridge-containing peptides
申请人:Robinson Andrea
公开号:US20070197429A1
公开(公告)日:2007-08-23
According to the present invention, there is provided a range of new conotoxin derivatives and methods for synthesizing these analogues and other intramolecular dicarba bridge-containing peptides, including dicarba-disulfide bridge-containing peptides.
Methods for the synthesis of dicarba bridges in organic compounds
申请人:Robinson Andrea Jane
公开号:US09102708B2
公开(公告)日:2015-08-11
The present invention relates to methods for forming dicarba bridges in organic compounds. This involves the use of a pair of complementary metathesisable groups on the organic compound, and subjecting the compound to cross-metathesis under microwave radiation conditions. In an alternative, the compounds contain a turn-inducing group between the pair of cross-metathesisable groups to facilitate the cross-metathesis.
A new convenient synthesis of N-acyl-2-(dimethoxyphosphoryl)glycinates
作者:Roman Mazurkiewicz、Anna Kuźnik
DOI:10.1016/j.tetlet.2006.03.051
日期:2006.5
smoothly with trimethylphosphite in the presence of methyltriphenylphosphonium iodide to give N-acyl-2-(dimethoxyphosphoryl)glycinates in good or very good yields. The dimethoxyphosphorylglycinates may be isolated by column chromatography, or used directly for the Wadsworth–Emmons synthesis of α,β-dehydro-α-amino acids in a one-pot procedure without purification.