Aqueous‐Phase Amination of Biogenic Isohexides by using Ru/C as a Solid Catalyst

Abstract

Figure 4. Reactionkinetics of the amination of isomannide at 170 8Cand 10 bar hydrogen pressure obtained from single-batch experiments. The data point at t = 0hand the connecting linesare added for clarity.

Efficient Synthesis of 5-Amino-1-pentanol from Biomass-Derived Dihydropyran over Hydrotalcite-Based Ni–Mg3AlOx Catalysts

“…These findings indicate that high H 2 pressure favors not only the RA of 2-HTHP to the target 5-AP product, but also the direct hydrogenation of the highly reactive intermediate of 5-HP and 5-HPIP to 1,5-PD and DPA side-products, respectively. Previous studies in the RA of carbonyl compounds 29 and the direct amination of alcohols 6,31,34 also show that increase of H 2 pressure promoted both the desired and side reactions. Therefore, an appropriate H 2 pressure, i.e., 2 MPa is required for the efficient RA of 2-HTHP to produce 5-AP.…”

Direct Amination of Isohexides via Borrowing Hydrogen Methodology: Regio‐ and Stereoselective Issues

“…It could be emphasized that Rose et al reported the first mono‐amination of isosorbide using Ru/C in aqueous ammonia under H 2 pressure at 170 °C within 50 to 60 % conversion (GC). Due to a lack of diastereoselectivity, a mixture of the two amino‐alcohols was obtained . More recently, Barta et al also reported the mono‐amination of isosorbide using a supported‐Ni catalyst and aqueous ammonia within 32 to 51 % GC yield but without information concerning the stereochemistry .…”

Alternative Monomers Based on Lignocellulose and Their Use for Polymer Production

“…Recently, it was proven that also solid catalysts such as Ru/C can be used in the amination of isohexides . To maintain catalyst activity, a certain hydrogen pressure of at least 5 bar is necessary.…”