Solvent-Dependent Regio- and Stereoselective Oxidation of [2.2]Paracyclophane-Derived Phenols
作者:Roman P. Zhuravsky、Dmitrii Yu. Antonov、Elena V. Sergeeva、Ivan A. Godovikov、Zoya A. Starikova、Anna V. Vologzhanina、Natalia V. Atman
DOI:10.1002/ejoc.201501565
日期:2016.2
formed upon oxidation of 4-hydroxy[2.2]paracyclophane and its derivatives with Cu(OH)Cl·TMEDA depends on the solvent used. In MeOH oxidation accompanied with nucleophilic attack of the solvent to furnish predominantly or exclusively ortho-cyclohexadienones (o-quinol methyl ethers) of (Rp*,Rp*) relative configuration. Oxidation carried out in CH2Cl2 results in regio- and stereoselective formation of para-cyclohexadienone
用 Cu(OH)Cl·TMEDA 氧化 4-羟基 [2.2] 对环烷及其衍生物后形成的产物的结构取决于所用的溶剂。在 MeOH 中,氧化伴随着溶剂的亲核攻击,主要或仅提供具有 (Rp*,Rp*) 相关构型的邻环己二烯酮(邻羟基喹啉甲基醚)。在 CH2Cl2 中进行的氧化导致对环己二烯酮二聚体各种取代的 7,7'-双[2.2]对环芳-4,4'(7H,7'H)-二酮}与 (Sp*, Rc*,Rc*,Sp*) 相对和 (Rp,Sc,Rc,Sp) 绝对构型(每种情况下六种可能的非对映体中的两种),而对映体纯苯酚的氧化产生各自的单一产物。