Enantioselective Synthesis of Biphenols from 1,4-Diketones by Traceless Central-to-Axial Chirality Exchange
摘要:
A method for the enantioselective synthesis of biphenols from readily prepared 1,4-diketones is reported. Key to the success of this method is the highly selective transfer of central to axial chirality during a double aromatization event triggered by BF3 center dot OEt2. On the basis of X-ray crystallographic data, a stereochemical model for this chirality exchange process is put forth.
Oxygenophilic organoaluminum-mediated conjugate addition of alkyllithium and Grignard reagents to quinone monoketals and quinol ethers. The directing effect of a methoxy group on the 1,4-addition process
Oxygenophilic organoaluminium-promoted 1,4-addition of organolithium reagents to quinone monoacetals
作者:Alan J. Stern、John S. Swenton
DOI:10.1039/c39880001255
日期:——
Complexation of quinone monoacetals with methylaluminium bis-(2,6-di-t-butyl-4-methylphenoxide), followed by addition of organolithium reagents, gives products from 1,4-addition of the organolithium reagent to the quinone monoacetal.
Synthesis of <i>meta</i>
-Arylated Phenol Derivatives by Rhodium(I)-Catalyzed Arylation of Quinone Monoacetal
作者:Jianhang Huang、Na Liu、Tao Lu、Xiaowei Dou
DOI:10.1002/adsc.201800778
日期:2018.9.17
The first selective synthesis of meta‐arylphenol derivatives by arylation of quinone monoacetal is reported. The transformation was achieved under Rh(I) catalysis via a formal arylation/demethoxylation process, and valuable meta‐arylphenols were obtained in high yields under mild conditions. Remarkably, an unprecedented convergent reaction pathway was assumed to be involved.
STERN, ALAN J.;ROHDE, JEFFREY J.;SWENTON, JOHN S., J. ORG. CHEM., 54,(1989) N8, C. 4413-4419
作者:STERN, ALAN J.、ROHDE, JEFFREY J.、SWENTON, JOHN S.
DOI:——
日期:——
STERN, ALAN J.;SWENTON, JOHN S., J. CHEM. SOC. CHEM. COMMUN.,(1988) N 18, C. 1255-1256
作者:STERN, ALAN J.、SWENTON, JOHN S.
DOI:——
日期:——
Oxygenophilic organoaluminum-mediated conjugate addition of alkyllithium and Grignard reagents to quinone monoketals and quinol ethers. The directing effect of a methoxy group on the 1,4-addition process