An efficient coupling of terminal alkynes and CO2 in the presence of alkyl halides can be achieved under ambient conditions using a copper/phosphine catalyst system, providing facile access to a variety of functionalised alkyl 2-alkynoates.
Anhydrous Conditions Enable the Catalyst‐Free Carboxylation of Aromatic Alkynes with CO
<sub>2</sub>
under Mild Conditions
作者:Davide Toniolo、Felix D. Bobbink、Paul J. Dyson、Marinella Mazzanti
DOI:10.1002/hlca.201900258
日期:2020.2
attractive method for the synthesis of carboxylic acids. Here we show that direct carboxylation of terminal alkynes can be simply performed in near‐quantitative yield in four hours with anhydrous Cs2CO3 undermildconditions without need of a metal catalyst.
CO 2是一种廉价且广泛使用的C1来源,芳烃炔烃直接羧化是合成羧酸最有吸引力的方法。在这里,我们表明,在温和条件下,无水Cs 2 CO 3可以在四小时内以接近定量的产率简单地进行末端炔烃的直接羧化,而无需金属催化剂。