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Synthesis of ketones by derivatisation (hydration) of alkynes
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Activated pyridine borane complexes (Py·BH2X) are capable of
hydroborating alkenes at room temperature. An unusual hydroboration
mechanism is discussed. Hydroboration of alkynes with Py·BH2I
selectively affords the monoadducts. The preparation of synthetically useful
potassium alkyltrifluoroborate salts is described.
J. M. Clay, E. Vedejs, J. Am. Chem. Soc.,
2005, 127, 5766-5767.

Sodium perborate: a mild and convenient reagent for efficiently oxidizing
organoboranes
G. W. Kabalka, T. M. Shoup, N. M. Goudgaon, J. Org. Chem., 1989, 5930-5933.

A ruthenium-catalyzed hydrative cyclization converts a range of 1,5-enynes
bearing terminal alkyne and Michael acceptor moieties into cyclopentanone
derivatives.
Y. Chen, D. M. Ho, C. Lee, J. Am. Chem. Soc.,
2005, 127, 12184-12185.
