Direct and Facile Bromination at the 5- and 5′-Positions of (<i>R</i>)-6,6′-Dialkyl- and (<i>R</i>)-6,6′-Diaryl-2,2′-Binaphthols
作者:Yixiang Cheng、Shuwei Zhang、Yan Liu、Hui Huang、Lifei Zheng、Linglin Wu
DOI:10.1055/s-2008-1042902
日期:2008.4
(R)-5,5′-Dibromo-6,6′-dibutyl-2,2′-binaphthol, (R)-5,5′-dibromo-6,6′-di(4-methylphenyl)-2,2′-binaphthol, (R)-5,5′-dibromo-6,6′-di(3,5-dimethylphenyl)-2,2′-binaphthol, and (R)-5,5′-dibromo-6,6′-di(4-trifluoromethylphenyl)-2,2′-binaphthol were synthesized from (R)-1,1′-bi-2-naphthol by a five-step reaction in excellent yields under mild conditions.
(R)-5,5′-二溴-6,6′-二丁基-2,2′-联萘酚,(R)-5,5′-二溴-6,6′-二(4-甲基苯基)-2,2′-联萘酚,(R)-5,5′-二溴-6,6′-二(3,5-二甲基苯基)-2,2′-联萘酚、在温和条件下,通过五步反应从(R)-1,1′-联-2-萘酚合成了(R)-5,5′-二溴-6,6′-二(4-三氟甲基苯基)-2,2′-联萘酚,产量极佳。