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Transfer semihydrogenation of alkynes catalyzed by a zero-valent palladium N-heterocyclic carbene complex
被引:156
|作者:
Hauwert, Peter
[1
]
Maestri, Giovanni
[2
]
Sprengers, Jeroen W.
[1
]
Catellani, Marta
[2
]
Elsevier, Cornelis J.
[1
]
机构:
[1] Univ Amsterdam, Vant Hoff Inst Mol Sci, NL-1018 WV Amsterdam, Netherlands
[2] Univ Parma, Dipartimento Chim Organ & Ind, I-43100 Parma, Italy
关键词:
alkynes;
carbene ligands;
hydrogen transfer;
hydrogenation;
palladium;
D O I:
10.1002/anie.200705638
中图分类号:
O6 [化学];
学科分类号:
0703 ;
摘要:
(Chemical Equation Presented) Beyond Lindlar and without hydrogen: Transfer hydrogenation of internal alkynes catalyzed by a palladium(0) catalyst containing an N-heterocyclic carbene ligand gives Z alkenes without over-reduction to alkanes (see scheme). Contrary to most transfer hydrogenations, ketones are not reduced. As such, this is the first catalyst that shows excellent stereo- and chemo-selectivity for the semihydrogenation of alkynes without the need for hydrogen gas. © 2008 Wiley-VCH Verlag GmbH & Co. KGaA.
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页码:3223 / 3226
页数:4
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