Application of the polyacrylonitrile fiber as a support for the green heterogeneous base catalyst and supported phase-transfer catalyst

Abstract

Highly efficient and recyclable polyethylene polyamine functionalized polyacrylonitrile fiber as the heterogeneous base catalyst and supported phase-transfer catalyst.

Pyrrolidine modified PANF catalyst for asymmetric Michael addition of ketones to nitrostyrenes in aqueous phase

“…[33][34][35] During the last few years, a number of PANF immobilized catalysts (such as Brønsted acid catalyst, ionic liquid catalyst and organocatalyst) have been designed, synthesized, and successfully applied in organic syntheses such as Knoevenagel condensation, iminocoumarin synthesis and sulfone synthesis by our group. 26,[36][37][38][39][40][41] All these results signify a brand new area of application for fibers beyond their general application in materials science. In particular, in 2013, List's group 42 developed a simple approach to immobilize a homogeneous chiral organo-catalyst on nylon fiber, and reported the first example of asymmetric reactions catalyzed by fiber-supported organocatalysts.…”

Synthesizing Substituted 2-Amino-2-chromenes Catalyzed by Tertiaryamine-Functionalized Polyacrylonitrile Fiber for Students To Investigate Multicomponent Reactions and Heterogeneous Catalysis

“…PANF is also an ideal starting material for the preparation of heterogeneous catalysts, since it has properties including low cost (12 yuan or two dollars per kilogram), corrosion and mildew resistance, high strength (resistance to stretching about 10 cN for single silk), and low density. Therefore, PANF is a suitable material for the preparation of fiber catalysts …”

Polyacrylonitrile fiber‐based heterogeneous catalysts for organic transformations

“…Xian‐Lei Shi et al . have synthesized a facile polyethylene polyamine modified PANF catalyst (Figure 5a), which not only acts as a supported base catalyst in Knoevenagel condensation but also as a heterogeneous phase‐transfer catalyst in nucleophilic substitution reactions in water [38] . Lichao Ma et al .…”

“…[18a] Xian-Lei Shi et al have synthesized a facile polyethylene polyamine modified PANF catalyst (Figure 5a), which not only acts as a supported base catalyst in Knoevenagel condensation but also as a heterogeneous phase-transfer catalyst in nucleophilic substitution reactions in water. [38] Lichao Ma et al have developed a new N-methylpiperazine modified PANF catalyst (Figure 5b) which could be utilized to promote the Gewald reaction of numerous activated nitriles with 2,5-dihydroxy-1,4dithiane to afford the 3-substituted 2-aminothiophenes with excellent yields of 65-91 % with recyclability (10 times). [39] Changzhu Xu et al have synthesized an innovative tertiary aminated immobilized PANF catalyst (Figure 5c) by a simple two-step procedure.…”