A simple protocol for determination of enantiopurity of amines using BINOL derivatives as chiral solvating agentsvia¹H- and¹⁹F-NMR spectroscopic analysis

Abstract

A rapid and simple protocol for the determination of enantiopurity of primary and secondary amines was developed by using enantiopure BINOL and their derivatives as chiral solvating agents via1H- and 19F-NMR spectroscopic analysis.

Luminescent Behavior of Zn(II) and Mn(II) Halide Derivatives of 4-Phenyldinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepine 4-Oxide and Single-Crystal X-ray Structure Determination of the Ligand

“…Absorption spectra were recorded with a Yoke 6000Plus double-beam spectrophotometer (Fengxian, China). Specific rotation [α] 20 D was measured for acetone solutions using an Exacta+Optech (Modena, Italy) Polarimeter model PL1 LED (λ = 589.3 nm).…”

“…A recent noticeable example is constituted by the integration of chiral BINOL-phosphoric acid and Cu(II)-porphyrin modules into a single framework, able to promote the asymmetric α-benzylation of aldehydes via visible-light-induced photothermal conversion [ 14 ]. Actual advanced applications of BINOL-based compounds include supramolecular enantiorecognition, which is also based on luminescence measurements, and the development of materials with chiral optical properties [ 15 , 16 , 17 , 18 , 19 , 20 , 21 ]. Recent examples in this field are chiroptical switches constituted by tetrahedral boron BINOL derivatives containing fluorene- or dibenzosuberenone-substituted pyridinylhydrazone moieties that exhibit noticeable chiroptical changes after visible light irradiation [ 22 ].…”