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WYD95043279

金虫 (小有名气)

[求助] 求金属催化化学,英文翻译中文

The first efficient intermolecular reaction of gold carbene intermediates generated via gold-catalyzed alkyne oxidation has been realized using nitriles as both the reacting partner and the reaction solvent, offering a generally efficient synthesis of 2,5-disubstituted oxazoles with broad substrate scope. The overall reaction is a [2 + 2 + 1] annulation of a terminal alkyne, a nitrile, and an oxygen atom from an oxidant. The reaction conditions are exceptionally mild, and a range of functional groups are easily tolerated. With complex and/or expensive nitriles, only 3 equiv could be sufficient to achieve serviceable yields in the absence of any solvent and using only 1 mol % BrettPhosAuNTf2 as the catalyst.

[ Last edited by WYD95043279 on 2012-5-6 at 20:13 ]

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WYD95043279: 金币+10, 翻译EPI+1, 有帮助 2012-05-07 11:24:41
sltmac: 金币+20 2012-05-23 08:28:40
我们发现用腈类化合物既做底物又做溶剂与金催化炔氧化的金卡宾中间体进行反应,能够有效合成2,5-双取代恶唑化合物。此类反应适合一系列底物的进行。所有反应都是端炔、腈和氧化剂上的一个氧原子进行的[2 + 2 + 1] 成环反应。反应条件极其温和,官能团兼容性强。对于复杂的或昂贵的腈类化合物,以1 mol % BrettPhosAuNTf2 作催化剂仅需要3当量的腈在无溶剂的情况下便可以反应。
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2楼2012-05-06 23:08:03
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