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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Cyclometallated gold(III) aryl-pyridine complexes as efficient catalysts for three-component synthesis of substituted oxazoles
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Cyclometallated gold(III) aryl-pyridine complexes as efficient catalysts for three-component synthesis of substituted oxazoles

机译：环金属化的金（III）芳基-吡啶配合物是取代三唑类三组分合成的有效催化剂

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摘要

Cyclometallated aryl-pyridine gold(III) complexes are shown to be efficient catalysts for the multicomponent reaction between N-benzyl imines, alkynes, and acyl chlorides to form trisubstituted oxazoles. The reaction typically proceeds in good yields (up to over 80%) and short reaction times (similar to 15 minutes). The high stability of the investigated cyclometallated catalysts enables a retained efficiency for this reaction in terms of rate and yield using as little as 0.5 mol% catalyst, a reduction by an order of magnitude compared to previously used Au(III)-salen complexes. An attractive feature of the present catalytic system is that active catalysts can be formed from simple pre-catalysts under the reaction conditions. Both cyclometallated and non-cyclometallated complexes were characterized in the solid state by single crystal X-ray diffraction.
机译：环金属化的芳基-吡啶金（III）配合物被证明是N-苄基亚胺，炔烃和酰氯之间形成三取代恶唑的多组分反应的有效催化剂。反应通常以良好的收率（高达80％以上）和较短的反应时间（约15分钟）进行。所研究的环金属化催化剂的高稳定性使得使用低至0.5 mol％的催化剂在速率和收率方面都能保持该反应的效率，与先前使用的Au（III）-salen配合物相比降低了一个数量级。本催化体系的一个吸引人的特征是活性催化剂可以在反应条件下由简单的预催化剂形成。环金属化和非环金属化的配合物均通过单晶X射线衍射表征为固态。

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