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- Title
Supported Cu<sup>II</sup> Single‐Ion Catalyst for Total Carbon Utilization of C<sub>2</sub> and C<sub>3</sub> Biomass‐Based Platform Molecules in the N‐Formylation of Amines.
- Authors
Dai, Xingchao; Wang, Xinzhi; Rabeah, Jabor; Kreyenschulte, Carsten; Brückner, Angelika; Shi, Feng
- Abstract
The shift from fossil carbon sources to renewable ones is vital for developing sustainable chemical processes to produce valuable chemicals. In this work, value‐added formamides were synthesized in good yields by the reaction of amines with C2 and C3 biomass‐based platform molecules such as glycolic acid, 1,3‐dihydroxyacetone and glyceraldehyde. These feedstocks were selectively converted by catalysts based on Cu‐containing zeolite 5A through the in situ formation of carbonyl‐containing intermediates. To the best of our knowledge, this is the first example in which all the carbon atoms in biomass‐based feedstocks could be amidated to produce formamide. Combined catalyst characterization results revealed preferably single CuII sites on the surface of Cu/5A, some of which form small clusters, but without direct linking via oxygen bridges. By combining the results of electron paramagnetic resonance (EPR) spin‐trapping, operando attenuated total reflection (ATR) IR spectroscopy and control experiments, it was found that the formation of formamides might involve a HCOOH‐like intermediate and.NHPh radicals, in which the selective formation of.OOH radicals might play a key role.
- Subjects
CHEMICAL processes; FORMAMIDE; FORMYLATION; ATTENUATED total reflectance; ELECTRON paramagnetic resonance spectroscopy; ELECTRON paramagnetic resonance; AMINES; GLYCOLIC acid
- Publication
Chemistry - A European Journal, 2021, Vol 27, Issue 68, p16889
- ISSN
0947-6539
- Publication type
Academic Journal
- DOI
10.1002/chem.202102300