CO<sub>2</sub>-assisted synthesis of non-symmetric α-diketones directly from aldehydes<i>via</i>C–C bond formation
作者:Pradipbhai Hirapara、Daniel Riemer、Nabanita Hazra、Jignesh Gajera、Markus Finger、Shoubhik Das
DOI:10.1039/c7gc02425h
日期:——
CO2-assisted various symmetric and non-symmetric α-diketones have been synthesized directly from the corresponding aldehydes using transition metal-free catalysts. This method can even be applied to synthesize pharmaceuticals directly from aldehydes. The crucial role of CO2 has been investigated in detail and the mechanism is proposed on the basis of experiments and DFT calculations.
A conceptual method for the preparation of 1,2-diketones is reported. The selective C–C bond cleavage of 1,3-diketones affords the 1,2-diketones in high yields under mild reaction conditions in air by the use of FeCl3 as the catalyst and tert-butyl nitrite (TBN) as the oxidant without the use of solvent. The possible reaction mechanism is discussed. This protocol provides an expeditious route to the