Inclusion Resolution of 1,1 '-Bi-2-naphthol: Crystal Structure and CD Spectroscopy of the Inclusion Complexes
- 化学化工－已发表论文 
A highly efficient and environmentally friendly method for the resolution of racemic 1,1'-bi-2-naphthol (BINOL) was developed by inclusion complexation with the cheap and readily accessible (R)/(S)-N, N, N-trimethyl-1-hydroxyl. 3-methyl-2-butanaminiumiodide resolving agents, which were prepared by a simple two. step reaction starting with D/L. valinol. The X. ray structural analysis was carried out for the inclusion complex of the (R). quaternary ammonium salt with (R). BINOL in CH3OH. This showed that the O-H center dot center dot center dot I- hydrogen bonds among the bridged iodide anions with the alcoholic hydroxyl of the host (resolving agent) and the phenolic hydroxyls of the guests (BINOL) together with the C-H center dot center dot center dot O hydrogen. bond interactions between the host and guest molecules from the adjacent layers are responsible for the chiral recognition in the inclusion complex formation. In addition, the solution and solid. state circular dichiroism(CD) spectra of a pair of inclusion complexes were also carefully investigated.