Citation:
WANG Xiao-Mei, HAN Peng, QIU Xue-Peng, JI Xiang-Ling, GAO Lian-Xun. Synthesis and Characterization of Novel Chiral Organosiliane Derivatives of (S)-BINOL[J]. Chinese Journal of Applied Chemistry,
;2009, 26(1): 42-46.
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Novel chiral triethoxysilane derivatives of(S)-1,1'-bi-2-naphthol(BINOL) substituted at 3 and 3,3' positions of binaphthyl backbone were synthesized conveniently from 2,2'-bis(methoxymethy)-1,1'-binaphthol through three steps,i.e.,carbonylation,reduction and Williamson reaction with 3-chloropropyltriethoxysilane using sodium hydride as a deprotonation reagent.Other chiral triethoxysilane derivatives of(S)-BINOL substituted at 6 and 6,6' positions of binaphthyl backbone were prepared through four steps,including bromization at 6 and 6,6' positions of binaphthyl backbone in addition to the three steps mentioned above.The yields of the four compounds are 84%,62%,82% and 67% respectively.The obtained compounds are stable at room temperature and can be purified by column chromatography.The structures of the final products were characterized by 1H NMR,13C NMR,29Si NMR,IR,ESI-MS and elemental analysis.The silicon atom was confirmed to exist as triethoxysilane in the derivatives by 29Si NMR.
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