Microwave‐Assisted Decarbonylation of Biomass‐Derived Aldehydes using Pd‐Doped Hydrotalcites

Abstract

Scheme1.Decarbonylation strategy for converting lignocellulose to platform chemicals HMF,furfural, furfuryl alcohol, and furan.[a] Dr.

Pd‐Catalysed Decarbonylation Free Approach to Carbonylative Esterification of 5‐HMF to Its Aryl Esters Synthesis Using Aryl Halides and Oxalic Acid as C1 Source

“…also observed the labile nature of the aldehyde (−CHO) group of 5‐HMF under Pd/Al 2 O 3 catalyst conditions under compressed CO 2 and got furfuryl alcohol as major product at 145 °C (Scheme 1b) [15] . Similarly, decarbonylation of 5‐HMF also noticed under microwave assisted flow conditions using Pd‐Hydrotalcite as catalyst [16] . In literature, maximum reports have been published on the decarbonylation of 5‐HMF and furfural, derived by heterogeneous Pd catalysts.…”

“…[15] Similarly, decarbon-ylation of 5-HMF also noticed under microwave assisted flow conditions using Pd-Hydrotalcite as catalyst. [16] In literature, maximum reports have been published on the decarbonylation of 5-HMF and furfural, derived by heterogeneous Pd catalysts. More recently, Wu et al reported the decarbonylation of aldehyde group from 5-HMF and its in situ participation in carbonylative esterification with aryl iodide, Rh(cod)BF 4 as catalyst and DPPP as ligand for furfuryl esters synthesis.…”

Decarbonylative Olefination of Aldehydes to Alkenes

“…Recently we reported the high activity of heterogeneous catalysts based on Pd-doped hydrotalcites (Pd-HTs) for selective decarbonylation of aldehydes. 4 In the course of this study we observed that a,b-unsaturated aldehydes decarbonylate faster than aromatic and saturated aliphatic aldehydes. Given that hydortalcites, composed of metal hydroxide sheets sandwiched by anions and water, have basic sites, they can promote aldol condensation.…”

The construction of novel and efficient hafnium catalysts using naturally existing tannic acid for Meerwein–Ponndorf–Verley reduction

“…The by-product 7c might have formed from 7 by a decarbonylation reaction in the presence of the Lewis acid sites of Ar-O-Hf and the solvent 2-PrOH. 59 Besides the target product and the detectable byproducts mentioned above, humins were another important class of byproducts (3b, 6b, 8b and 9b). 60 Overall, these results showed that Hf-TA was efficient for the conversion of various substrates with different structures.…”