- Pronounced solvent effect on the hydrostannylation of propargylic alcohol derivatives with nBu3SnH/Et3B at room temperature
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The solvent is key: A general protocol is described for the hydrostannylation of propargyl alcohol derivatives at room temperature using Et3B/O2 as the promoter (see scheme). Rate and mechanistic studies point to a different autoxidation product of Et3B in THF than is observed in benzene, the typical solvent. Copyright
- Oderinde, Martins S.,Organ, Michael G.
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supporting information
p. 2615 - 2618
(2013/03/14)
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- General synthesis of alkylalkenylalkynylboranes via haloboranes
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Methyl alkylalkenylborinates, obtained via hydroboration of alkynes with alkylbromoboranes, followed by methanolysis, react with alkynyllrthium reagents in THF to form the corresponding ate complexes, which, on treatment with 1.33 equiv of BF3·OEt2, produce the desired alkylalkenylalkynylboranes, thus providing a convenient and simple synthesis of these hitherto inaccessible organoboranes.
- Brown, Herbert C.,Basavaiah,Bhat
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p. 1468 - 1470
(2008/10/08)
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