Regioselective dihalohydration reactions of propargylic alcohols: gold-catalyzed and noncatalyzed reactions.

Regioselective dihalohydration reactions of propargylic alcohols: gold-catalyzed and noncatalyzed reactions.
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DOI:
10.1002/anie.201405348
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发表时间:
2014-09-26
影响因子:
16.6
通讯作者:
Sheppard, Tom D.
Sheppard, Tom D.
中科院分区:
化学1区
文献类型:
--
作者:
D'Oyley, Jarryl M.;Aliev, Abil E.;Sheppard, Tom D.

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The regioselective conversion of propargylic alcohols into previously unreported α,α-diiodo-β-hydroxyketones was achieved by treatment with N-iodosuccinimide in the presence of a gold catalyst. The corresponding α,α-dichloro-β-hydroxyketones were obtained by treatment with trichloroisocyanuric acid in the absence of a catalyst. The latter reaction can be extended to other alkynols. These transformations can be used to prepare potentially useful halogenated building blocks. Preliminary mechanistic studies suggest that the reaction involves participation of the acetonitrile solvent in the formation of a 5-halo-1,3-oxazine intermediate.
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