نتایج جستجو برای: chemoselective

تعداد نتایج: 1372  

Journal: :Chemistry 2012
Henning S G Beckmann Andrea Niederwieser Manfred Wiessler Valentin Wittmann

Carbohydrate microarrays are an emerging tool for the high-throughput screening of carbohydrate-protein interactions that represent the basis of many biologically and medicinally relevant processes. The crucial step in the preparation of carbohydrate arrays is the attachment of carbohydrate probes to the surface. We examined the Diels-Alder reaction with inverse-electron-demand (DARinv) as an i...

Journal: :Chemical communications 2013
Yunlong Chen Lin Ding Huangxian Ju

A density tunable dendrimeric array was designed for assembly of a gold nanocluster probe, which was unloaded by its chemoselective recognition to cell surface sialic acid for in situ tracing of sialic acid density.

Journal: :Organic & biomolecular chemistry 2011
Rema B Devi Matthias Henrot Michaël De Paolis Jacques Maddaluno

An unprecedented domino synthesis of tetrahydrobenzofuran-4-ones is described implicating chemoselective alkylation of various 1,3-cyclohexanediones with bromocrotonate or crotonitrile followed by oxa-Michael cyclization. Further transformations of this core to reach molecular diversity are also presented.

Journal: :Chemical communications 2007
Per Antoni Daniel Nyström Craig J Hawker Anders Hult Michael Malkoch

A chemoselective and layered growth approach has been developed for the synthesis of dendrimers, combining Click chemistry with traditional esterification/etherification reactions, without the need for activation steps and with excellent overall yields.

Journal: :The Journal of organic chemistry 2009
Andrejs Pelss Esa T T Kumpulainen Ari M P Koskinen

Highly chemoselective conjugate reduction of chiral alpha,beta-unsaturated amino ketones has been developed by using triisopropyl phosphite ligated copper hydride complex. The highlights of the method are wide substrate compatibility and exceptional chemoselectivity.

Journal: :Organic & biomolecular chemistry 2009
Trent Conroy Katrina A Jolliffe Richard J Payne

An efficient protocol for the chemoselective removal of Dmab esters on the solid phase is reported; this method has been successfully utilised for the convergent solid phase synthesis of N-linked glycopeptides.

Journal: :Organic & biomolecular chemistry 2012
Andrew K Swenson Kate E Higgins Matthew G Brewer William W Brennessel Michael G Coleman

A convenient Cu(I)-catalyzed cycloaddition of electron rich internal aryl alkynes and diazoacetates was discovered for the chemoselective and regioselective synthesis of tetra-substituted furans and cyclopropenes in moderate isolated yields (18-67%), and alkyne conversion (29-73%).

Journal: :Chemical communications 2007
Jonathan D Wilden Lynsey Geldeard Chieh C Lee Duncan B Judd Stephen Caddick

2,4,6-Trichlorophenol (TCP) sulfonate esters undergo effective aminolysis under conventional heating and microwave irradiation; the reactivity of these species is such that chemoselective transformations of PFP sulfonate esters can be achieved.

Journal: :Chemical communications 2014
Alexey Volkov Fredrik Tinnis Tove Slagbrand Ida Pershagen Hans Adolfsson

Molybdenum hexacarbonyl (Mo(CO)6) was used as an efficient catalyst for the chemoselective reduction of the amide functionality in α,β-unsaturated compounds, under hydrosilylation conditions using 1,1,3,3-tetramethyldisiloxane (TMDS) as the hydride source.

2002
Geetha Gopalakrishnan Viswanathan Kasinath

A facile regioand chemoselective bromomethoxylation of alkenes under microwave irradiation conditions employing a new polymer supported brominechloride resin is reported. The resin is prepared from the commercially available chloride resin by a simple one step procedure.

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