Synthesis of Bis(trimethylstannyl)aryl Compounds via an S<sub>RN</sub>1 Mechanism with Intermediacy of Monosubstitution Products
作者:Alicia B. Chopa、María T. Lockhart、Gustavo F. Silbestri
DOI:10.1021/om020622o
日期:2002.12.1
,1‘-binaphthyl (2), useful as intermediates in the preparation of bidentate Lewis acids, have been synthesized from simple phenols through a two-step sequence. Thus, 2-chlorophenol, 1,2-dihydroxybenzene, and binaphthol were converted into the corresponding aryl diethyl phosphate esters 4−6, which on reaction with sodium trimethylstannide (3) in liquid ammonia, under irradiation, afforded 1 and 2, respectively
由简单的酚类合成了1,2-双(三甲基锡烷基)苯(1)和2,2'-双(三甲基锡烷基)-1,1'-联萘(2),它们可用作制备双齿路易斯酸的中间体。通过两步序列。因此,2-氯苯酚,1,2-二羟基苯,和联萘酚转化成相应的芳基二乙基磷酸酯4 - 6,其用trimethylstannide钠(反应3在液氨)照射下,得到1和2分别为,收率很高(66-82%)。获得的结果清楚地表明反应是通过S RN进行的一种机制,涉及一元替代产品的中介。