三苯基砷、锑辅助修饰的氮杂环卡宾钯配合物的合成及性质研究

来源 :中国化学会全国第十一届有机合成化学学术研讨会 | 被引量 : 0次 | 上传用户：dbsoldier

【摘要】

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【作者】

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杨进李品华杜娟张袖丽王磊

【机构】

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淮北师范大学化学与材料科学学院, 安徽淮北235000 安徽农业大学理学院应用化学系, 安徽合肥2

【出处】

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中国化学会全国第十一届有机合成化学学术研讨会

【发表日期】

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2014年5期

【关键词】

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N-杂环卡宾三苯基砷三苯基锑催化反应

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自从1991年Arduengo小组成功分离出稳定的游离氮杂环卡宾后,氮杂环卡宾及其配合物的合成、反应性能研究受到化学家们高度关注1.相对于其他配体,NHC配体具有更强的δ配位能力,并更易修饰.其次,通过在氮杂环卡宾配合物的金属中心引入辅助配体,可以有效的调节氮杂环卡宾的配位能力,改变金属配位中心的电子及立体效应,近而改变氮杂环卡宾与金属之间的配位与离解能力,增强其在催化反应中的催化活性2.为了扩展这方面的工作,我们利用三苯基砷、锑配体与不同的氮杂环卡宾钯化合物相互作用,合成了一系列混配的氮杂环卡宾钯化合物,并用X-射线单晶衍射表征了其结构.研究了其在催化经典的碳-碳键和碳-氮键偶联反应中的应用.实验表明:该类氮杂环卡宾钯化合物能够高效的催化氯代芳烃与有机硅试剂之间的Hiyama偶联反应以及氯代芳烃与芳胺之间的Buchwald-Hartwig胺化反应.

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