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建立了一个不使用有机溶剂的端炔C—H键羧化新体系:在Ag(I)/DBU(1,8-二氮杂二环十一碳-7-烯)催化体系中,通过超临界二氧化碳与端基炔的羧化反应,以较高产率得到了相应丙炔酸产物.在反应体系中,超临界二氧化碳既是反应物又是反应溶剂;助剂DBU起到了碱、亲核体和共催化剂的作用,并能够明显加快反应速率.筛选出的催化体系具有良好的催化反应活性和底物适应能力,能够实现液态、固态端基炔与超临界二氧化碳的直接羧化反应,为制备功能化丙炔酸类化合物提供了一个环境友好、简单、经济的合成路线.
A new system of C-H carboxylation of terminal alkynyl without using organic solvents was established. In the catalytic system of Ag (I) / DBU (1,8-diazabicycloundec-7-ene) In the reaction system, the supercritical carbon dioxide is both a reactant and a reaction solvent; the auxiliary DBU plays a role of alkali, nucleophile and And can significantly accelerate the reaction rate.Screened catalytic system has good catalytic activity and substrate adaptability, can realize the direct carboxylation reaction of liquid and solid end alkyne and supercritical carbon dioxide, and is a good choice for the preparation of the function Propargyls provide an environmentally friendly, simple and economical route to synthesis.