- Fluorous-tethered quenching reagents for solution phase parallel synthesis
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Commercially available fluorous-tethered reagents are employed to quench excess reactants and remove known impurities from crude reaction mixtures generated via solution phase parallel synthesis. Fluorous quenching reagents are expediently removed via FluoroFlash SPE columns to afford products in high yields and purities.
- Lindsley, Craig W.,Zhao, Zhijian,Leister, William H.
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- Ruthenium-catalyzed /V-alkylation of amines and sulfonamides using borrowing hydrogen methodology
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The alkylation of amines by alcohols has been achieved using 0.5 mol percent [Ru(p-cymene)CI2]2 with the bidentate phosphines dppf or DPEphos as the catalyst. Primary amines have been converted into secondary amines, and secondary amines into tertiary amines, including the syntheses of Piribedil, Tripelennamine, and Chlorpheniramine. A/-Heterocyclization reactions of primary amines are reported, as well as alkylation reactions of primary sulfonamides. Secondary alcohols requiremore forcing conditions than primary alcohols but are still effective a lkylating agents in the presence of this catalyst.
- Hamid, M. Haniti S. A.,Allen, C. Liana,Lamb, Gareth W.,Maxwell, Aoife C.,Maytum, Hannah C.,et al.
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supporting information; experimental part
p. 1766 - 1774
(2009/07/25)
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