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首页> 外文期刊>ACS catalysis >Hydrogenation of Biomass-Derived Levulinic Acid into gamma-Valerolactone Catalyzed by Palladium Complexes
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Hydrogenation of Biomass-Derived Levulinic Acid into gamma-Valerolactone Catalyzed by Palladium Complexes

机译:钯配合物催化生物质衍生的丙氨酸加氢成γ-戊内酯

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摘要

The selective catalytic hydrogenation and cyclization of levulinic acid (LA) into valuable ?-valerolactone (GVL) catalyzed by different palladium compounds was achieved in water under mild conditions with high yields. Either formic acid (FA) or molecular hydrogen (H-2) was used as a hydrogen source. The precatalyst [(dtbpe)PdCl2] (dtbpe = 1,2-(bis-di-tert-butylphosphino)ethane) (1) was highly active in the processes of LA hydrogenation (TON of 2100 and TOF of 2100 h(-1)) and in the dehydrogenation of formic acid to produce H-2 and carbon dioxide. The catalytically active complexes [(dtbpe)Pd(H)Cl)] (2) and [(dtbpe)(2)Pd-2(mu-H)(3)](+) (3) and the catalytically inactive complex [(dtbpe)(2)Pd-2(mu-H) (mu-CO)](+) (4) all formed in situ and were identified as species resulting from FA decomposition.
机译:在温和的条件下,在水中温和条件下,高产率地将乙酰丙酸(LA)选择性催化氢化并环化成有价值的α-戊内酯(GVL)。甲酸(FA)或分子氢(H-2)均用作氢源。预催化剂[(dtbpe)PdCl2](dtbpe = 1,2-(双-二叔丁基膦基)乙烷)(1)在LA加氢过程中具有很高的活性(TON为2100,TOF为2100 h(-1) ))并在甲酸脱氢中产生H-2和二氧化碳。催化活性络合物[(dtbpe)Pd(H)Cl)](2)和[(dtbpe)(2)Pd-2(mu-H)(3)](+)(3)和催化惰性络合物[ (dtbpe)(2)Pd-2(mu-H)(mu-CO)](+)(4)均在原位形成,并被鉴定为FA分解产生的物种。

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