Asymmetric Chlorination/Ring Expansion for the Synthesis of α-Quaternary Cycloalkanones
作者:Qin Yin、Shu-Li You
DOI:10.1021/ol5005565
日期:2014.3.21
A highly enantioselective chlorination/ringexpansion cascade for the construction of cycloalkanones with an all-carbon quaternary center was realized (up to 97% ee). Oxa-cyclobutanol substrates were employed for the first time in the ringexpansionreactions, affording the functionalized dihydrofuranones in excellent enantioselectivity.
Visible Light Photoredox-Catalyzed Arylative Ring Expansion of 1-(1-Arylvinyl)cyclobutanol Derivatives
作者:Su Jin Kwon、Dae Young Kim
DOI:10.1021/acs.orglett.6b02201
日期:2016.9.16
A visiblelightmediatedphotocatalytic arylation/ring expansion of alkenylcyclobutanols has been developed. This approach provides a mild and operationally simple access to the synthesis of functionalized cyclic ketones from the coupling reaction of alkenylcyclobutanols with aryldiazonium salts.
Catalyst-free selenylation/semipinacol rearrangement cascades of alkenyl cyclobutanols: synthesis of β-selenylated cyclopentanones
作者:Dae Young Kim
DOI:10.1080/00397911.2019.1616762
日期:2019.9.2
access β-selenated cyclic ketone derivatives through the catalyst-free selenylation and semipinacol rearrangement sequence of 1-(1-arylvinyl)cyclobutanols was developed. This reaction employs the easily accessible and shelf-stable benzeneselenyl bromide as an electrophilic selenium source, and the reaction has advantages of mild reaction conditions and broad substrate scope. Graphical Abstract
Visible-light-induced photocatalytic trifluoromethylation/1,2-carbon migration sequences for the synthesis of CF3-substituted cyclic ketones
作者:Saet Byeol Woo、Dae Young Kim
DOI:10.1016/j.jfluchem.2015.08.008
日期:2015.10
A visible-light-induced photoredox trifluoromethylation/1,2-carbon migration sequence of alkenols is described. This approach provides a mild and operationally simple access to the synthesis of CF3-substituted cyclic ketones via trifluoromethylation and 1,2-carbon migration of 1-(1-arylvinyl)cyclobutanol derivatives. (C) 2015 Elsevier B.V. All rights reserved.