A dearomatization/spiroannulation process has been successfully achieved between simple halophenols and α,β-unsaturated olefins under mild reaction conditions. This transformation addresses the chemoselectivity issue in the dearomatizative transformation of phenol scaffolds (6π-electron) caused by the SEAr process, enabling the construction of versatile cyclohexadienone frameworks containing contiguous
在温和的反应条件下,简单的卤代酚与α,β-不饱和烯烃成功实现了脱芳构化/螺环化过程。这种转化解决了 SE Ar工艺引起的苯酚支架(6π-电子)脱芳构化转化中的化学选择性问题,从而能够以高产率构建含有连续四元全碳中心的通用环己二烯酮框架。进一步的研究为该过程提供了有价值的见解,揭示了脱溴/螺环化是通过 S RN 1 途径发生的。
Synthetic method for multifunctionalized oligoarenes using pinacol esters of hydroxyphenylboronic acids
作者:Shunpei Ishikawa、Kei Manabe
DOI:10.1039/b603574d
日期:——
A synthetic method for multifunctionalized oligoarenes using rapid Suzuki–Miyaura coupling of pinacol esters of hydroxyphenylboronic acids and subsequent triflation of the hydroxy group was developed.
Selective deprotection of either alkyl or aryl silyl ethers from aryl, alkyl bis-silyl ethers
作者:Sudha V. Ankala、Gabriel Fenteany
DOI:10.1016/s0040-4039(02)00942-5
日期:2002.7
A pair of complementary methods was developed using CeCl3·7H2O/CH3CN and LiOH/DMF to selectively deprotect alkyl and aryl silyl ethers, respectively, from the corresponding bis-silyl ethers in excellent yields.