Functional chiral hybrid silica gels prepared from (R)- or (S)-binaphthol derivatives
作者:Anne Brethon、Peter Hesemann、Luc Réjaud、Joël J.E Moreau、Michel Wong Chi Man
DOI:10.1016/s0022-328x(01)00758-6
日期:2001.5
We describe the synthesis of new functional bis-trialkoxysilylated binaphtholderivatives I–V containing protected OH groups and cyano-, pyridyl- and carbamate-functionalities starting from optically pure (R)- or (S)-2,2′-dihydroxy-1,1′-binaphthyl (BINOL) and their subsequent transformation to hybrid silica gels via the sol–gel process. (R)-I was obtained by protection of hydroxyl groups of (R)-6,6′-dibromo-BINOL