O-24　バイオマス由来の溶媒と温和な条件でのコハク酸からのガンマブチロラクトン生成

抄録

Direct hydrogenation of succinic acid (SA) requires high-pressure hydrogen and widely uses carcinogenic substances as solvents. Therefore, we focused on catalytic transfer hydrogenation (CTH) with a bio-based solvent as a hydrogen donor. By using isopropyl alcohol, which is commonly used in CTH as a solvent, the yield of γ–butyrolactone (GBL) was less than 8mol%, and more than 58mol% of SA esters were obtained as by-products. When water was added to the solvent to reduce the esterification of SA, the GBL yield increased to 9.2mol% when 5vol% water, but the yield decreased when more than 5vol% of water was added. Results indicate that GBL formation from SA in CTH with isopropanol as solvent is inhibited by esterification of SA.