Polyoxometalate based hybrid chiral material: Synthesis, characterizations and aerobic asymmetric oxidation reaction. Issue 19 (2nd November 2019)

• Record Type: Journal Article
• Authors: Patel, Anjali; Patel, Ketan
• Is Part Of: Journal of coordination chemistry. Volume 72:Issue 19/21(2019)
• Page Start: 3417
• Page End: 3429
• Publication Date: 2019-11-02
• Subjects: Chiral -- Ruthenium -- Heterogeneous catalyst -- Phosphotungstate -- R-(-)-1-Cyclohexylethylamine; Coordination compounds -- Periodicals; 541.2242
• DOI: 10.1080/00958972.2019.1691723
• Languages: English
• ISSNs: 0095-8972

Abstract

Abstract: A new hybrid chiral material, comprising Keggin type mono ruthenium substituted phosphotungstate (PW11 Ru) and chiral (R-(-)-1-cyclohexylethylamine (Cy)), was synthesized in an aqueous medium by simple ligand substitution. The bonding was confirmed by FT-IR, multinuclear NMR ( 31 P, 13 C and 15 N), while the chirality was confirmed by CD spectroscopy and a polarimeter. The study reveals the attachment of Cy and PW11 Ru through N → Ru bond. An attempt was made to use the synthesized material as a heterogeneous catalyst for carrying out aerobic asymmetric oxidation of styrene and found that only 0.001 mg (7.9 × 10 −6 mmol) of Cy was sufficient to achieve very high TON. Abstract :