Abstract
A novel and green route for the synthesis of cyclopentane-1,3-diamine (CPDA) from hemicellulosic feed-stock is established in this work. Through many explorations and optimizations, the single successful multi-step synthesis was found to comprise: (1) the Piancatelli rearrangement of furfuryl alcohol to 4-hydroxycyclopent-2-enone (4-HCP), (2) a highly improved isomerization of 4-HCP into cyclopentane-1,3-dione (CPDO) using the Ru Shvo catalyst, (3) conversion of CPDO into cyclopentane-1,3-dioxime (CPDX), and (4) a mild oxime hydrogenation of CPDX over Rh/C to afford the desired CPDA. In addition, diastereomerically pure cis- and trans-isomers of CPDA were reacted with (A) bio-based lactones, and (B) 5-(hydroxymethyl)furfural (HMF) to synthesize novel bifunctional diol monomers with internal amide and imine groups, respectively. Monomer 5, derived using gamma-valerolactone (GVL), was successfully applied in the synthesis of polyurethanes.
| Original language | English |
|---|---|
| Pages (from-to) | 7100-7114 |
| Number of pages | 15 |
| Journal | Green Chemistry |
| Volume | 23 |
| Issue number | 18 |
| Early online date | 19 Aug 2021 |
| DOIs | |
| Publication status | Published - 21 Sept 2021 |
Keywords
- GAMMA-VALEROLACTONE
- ALLYLIC ALCOHOLS
- ENANTIOSELECTIVE SYNTHESIS
- ASYMMETRIC HYDROGENATION
- KINETIC RESOLUTION
- ISOMERIZATION
- CONVERSION
- BIOMASS
- CYCLOPENTANONE
- CHEMICALS