Studies on the L. E. Phenomenon

Expanding the Scope of Biomass‐Derived Chemicals through Tandem Reactions Based on Oxorhenium‐Catalyzed Deoxydehydration

“…To emphasize the utility of muconic acid and its ester (24)(25)(26) in commodity chemical synthesis, we also demonstrated the one-pot two-step conversion of 23 into dibutyl adipate 29 (Scheme 2 d). Upon treatment with NH 3 , [26] 36 furnishes 2-pyrrolidone, which can be converted into nylon 4 [27] or used as a precursor to Nmethylpyrrolidone (NMP), polyvinylpyrrolidone (PVP), and polyvinylpolypyrrolidone (PVPP). [25] Encouraged by the efficient DODH of mucic acid to muconic acid, a potential feedstock for nylon 6-6, we sought to obtain e-caprolactone from C6 aldonic acid for the production of nylon 6.…”

“…While our efforts on the downstream conversion of these unsaturated products to nylon 6 are underway, we also demonstrated the one-pot two-step conversion of d-erythronolactone (34) to g-butyrolactone (36) through g-crotonolactone (35) (Scheme 4 a). Upon treatment with NH 3 , [26] 36 furnishes 2-pyrrolidone, which can be converted into nylon 4 [27] or used as a precursor to Nmethylpyrrolidone (NMP), polyvinylpyrrolidone (PVP), and polyvinylpolypyrrolidone (PVPP). [28] Additionally, d-(+)-ribono-1,4-lactone (37), a C5 aldonic acid lactone derivative, was smoothly converted into 38 without optimization (Scheme 4 b).…”

Expanding the Scope of Biomass‐Derived Chemicals through Tandem Reactions Based on Oxorhenium‐Catalyzed Deoxydehydration

“…While our efforts on the downstream conversion of these unsaturated products to nylon 6 are underway, we also demonstrated the one‐pot two‐step conversion of D ‐erythronolactone ( 34 ) to γ‐butyrolactone ( 36 ) through γ‐crotonolactone ( 35 ) (Scheme ). Upon treatment with NH 3 ,26 36 furnishes 2‐pyrrolidone, which can be converted into nylon 427 or used as a precursor to N ‐methylpyrrolidone (NMP), polyvinylpyrrolidone (PVP), and polyvinylpolypyrrolidone (PVPP) 28. Additionally, D ‐(+)‐ribono‐1,4‐lactone ( 37 ), a C5 aldonic acid lactone derivative, was smoothly converted into 38 without optimization (Scheme ).…”

Suspension polymerization of 2‐pyrrolidone in the presence of CO2 and organic promoters

“…Polybutyrolactam (PBL), also known as polyamide 4 (PA4) or poly(2-pyrrolidone), has attracted much attention in the past century due to its favorable properties, including excellent mechanical resistance, hydrophilicity, dyeability, and moisture regain, which are similar to or even better than those of natural fibers, such as cotton and silk and traditional polyamides for textile fibers. [1][2][3] With the development of biotechnology, the monomer of PBL, 2-pyrrolidone, can now be obtained from biomass with lower cost. [4][5][6] Furthermore, PBL could be decomposed in activated sludge, compost soils, in vivo and even in seawater.…”