Reaction of organometallic reagents with aldehydes is one of the most used tranditional organometallic reactions. However, the reactivity of organometallic reagents with aromatic aldehydes is not full recognized by now. Recent research showed that Lewis acid (including these in situ occurred metal ions) have dramatic effect on the reactivity of organometallic reagents and in some instances, the type of product was changed at all. Recently, we have found that reaction of aromatic aldehyde with Grignard reagents gave ketones instead of alcohols as the major product under the catalysis of a Lewis acid AlCl3. This new funding shows that it is necessary to make an exclusive research to explore the new reaction mechanism of this Lewis acid mediated reaction of organometallic reagents with aryl aldehydes and to lay a foundation for the real application of Lewis acid in the reaction of organometallic reagents with aromatic aldehydes.
有机金属试剂与芳香醛的反应是很经典的有机金属试剂的反应之一,然而到目前为止,人们对有机金属试剂在这类反应中的反应性的认识还显不足。最近的研究表明,路易斯酸包括在这些反应中原位产生的金属卤化物对金属有机试剂的反应性能有很大的影响,甚至在有些情况下可以完全改变产物的类型,得到预期之外的新产物。在我们最近对格氏试剂与芳香醛的反应的研究中发现,在路易斯酸三氯化铝的催化下,格氏试剂与芳香醛的反应给出了一种与经典的亲核加成反应完全不同的产物- - 酮。这一新发现表明有必要对此类反应进行广泛、深入、细致的研究,以期阐明路易斯酸催化下有机金属试剂与芳香醛反应的新机制,为进一步揭示Lewis酸在有机金属试剂与芳香醛反应中的应用奠定基础。
有机金属试剂与芳香醛的反应是很经典的有机金属试剂的反应之一. 在本项目的支持下,我们发现路易斯酸包括在这些反应中原位产生的金属卤化物对金属有机试剂的反应性能有很大的影响。在路易斯酸三氯化铝以及氯化锌的存在下,格氏试剂与芳香醛的反应给出了一种与经典的亲核加成反应完全不同的产物——酮。进一步研究证明,本反应通过有机金属试剂对芳香醛的加成-Oppenauer氧化途径进行, 从而进一步扩大了有机金属试剂应用范围。
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数据更新时间:2023-05-31
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