Resin-Bound (Succinimid-1-yloxycarbonylmethyl)triphenylphosphonium Ylide - A Synthon for Rapid Access to Diverse Heterocycles under Microwave Heating
作者:Bernd Henkel
DOI:10.1055/s-2008-1032046
日期:2008.2
The synthesis of a novel and versatile resin-bound (succinimid-1-yloxycarbonylmethyl)triphenylphosphonium ylide is described. The use of this resin to the synthesis of several diverse heterocycles, whilst allowing for ease of workup, is reported.
A DMAP-catalyzed cascadeapproach allowing facile assembly of alkynyl coumarins is reported. By virtue of reactive o-AQM (in situ generated from modular propargylamine) and a new synthetic equivalent of acyl carbene (from pyridinium ylide), the reaction proceeds smoothly to afford a variety of alkynyl coumarins in good-to-excellent yields. This transition-metal-free and oxidant-free process features
Pd/Indanone-Based Ligands: An Efficient Catalyst System for Ullmann-Type, Suzuki–Miyaura, and Mizoroki–Heck Cross-Coupling Reactions with Aryl Tosylates and Aryl Halides
作者:Mohammed Waheed、Naseem Ahmed
DOI:10.1055/s-0036-1589058
日期:2017.9
efficiency. 2-Hydroxyindan-1-ones have been efficiently synthesized and successfully applied as ligands in Pd-catalyzed Ullmann type, Suzuki–Miyaura, and Mizoroki–Heckcross-couplingreactions with aryl tosylates and aryl halides. The ligands are air- and moisture-stable and have shown high catalytic activity with Pd(OAc)2 in these cross-couplingreactions. The system tolerates a variety of functional
Handy Protocols using Vinyl Nosylates in Suzuki-Miyaura Cross-Coupling Reactions
作者:Anna Dikova、Nicolas P. Cheval、Aurélien Blanc、Jean-Marc Weibel、Patrick Pale
DOI:10.1002/adsc.201500682
日期:2015.12.14
Vinylnosylates derived from 1,3-dicarbonyl compounds could be engaged in Suzuki–Myaura cross coupling reactions with aryl-, vinyl- and methylboronic acids or trifluoborate derivatives at room temperature in the presence of 2 mol% of [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) [PdCl2(dppf)]. One-pot procedures have been set up for practical and efficient nosylation–cross-coupling reactions
Novel coumarin-amide derivatives and its preparation, said drug composition and its use
申请人:Xu Shiping
公开号:US20060148834A1
公开(公告)日:2006-07-06
The present invention relates to novel coumarin derivatives, their carboxamides, pharmaceutical compositions containing them and their uses as drugs for kidney protection, treating drugs of hypertension, cardio-cerebrovascular diseases, non-insulin dependent diabetes, tumor, pre-cancerous lesion, and edemas.