Ruthenium catalyzed hydroboration of terminal alkynes to Z-vinylboronates.

阅读量:

120

作者:

C GunanathanM HoelscherF PanW Leitner

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摘要:

The nonclassical ruthenium hydride pincer complex [Ru(PNP)(H)(2)(H(2))] 1 (PNP = 1,3-bis(di-tert-butyl-phosphinomethyl)pyridine) catalyzes the anti-Markovnikov addition of pinacolborane to terminal alkynes yielding Z-vinylboronates at mild conditions. The complex [Ru(PNP)(H)(2)(HBpin)] 2 (HBpin = pinacolborane), which was identified at the end of the reaction and prepared independently, is proposed as the direct precursor to the catalytic cycle involving rearrangement of coordinated alkyne to Z-vinylidene as a key step for the apparent trans-hydroboration.

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DOI:

10.1055/s-0032-1317610

被引量:

167

年份:

2012

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