155935-06-1Relevant articles and documents
Synthesis of azophenolic crown ethers of Cs symmetry incorporating cis-1-phenylcyclohexane-1,2-diol residues as a steric barrier and diastereotopic face selectivity in complexation of amines by their diastereotopic faces
Naemura, Koichiro,Takeuchi, Sachiko,Asada, Masaki,Ueno, Koji,Hirose, Keiji,et al.
, p. 1429 - 1436 (2007/10/02)
Azophenolic crown ethers 1 and 2 of Cs symmetry incorporating cis-1-phenylcyclohexane-1,2-diol residues as a steric barrier have been prepared.Diastereotopic face selectivity in complexation with 2-methoxyethylamine, n-propylamine and ethanolamine was examined using temperature-dependent 1H NMR spectroscopy.Both bind ethanolamine stereoselectively to one of their diastereotpic faces; the prediction of which diastereotopic complex was preferentially formed is made on the basis of a CPK molecular-model examination of the complexes.