2,2-Difluoro-1,3-diketones as <i>gem</i>
-Difluoroenolate Precusors for Asymmetric Aldol Addition with <i>N</i>
-Benzylisatins
作者:Jinlong Qian、Wenbin Yi、Xin Huang、Jerry P. Jasinski、Wei Zhang
DOI:10.1002/adsc.201600392
日期:2016.9.1
2,2‐Difluoro‐1,3‐diketones are introduced as gem‐difluoroenolate precursors for the first example of an organocatalytic asymmetric aldol addition with N‐benzylisatins to form 3‐difluoroalkyl‐3‐hydroxyoxindoles.
Organocatalytic Biomimetic Decarboxylative Aldol Reaction of Fluorinated β‐Keto Acids with Unprotected Isatins
作者:Yin‐Long Li、Xue‐Lin Wang、Dan Xiao、Ming‐Ying Liu、Yunfei Du、Jun Deng
DOI:10.1002/adsc.201800831
日期:2018.11.5
3‐hydroxyoxindoles through the biomimetic decarboxylative aldol reaction of fluorinated β‐ketoacids with unprotected isatins catalyzed by quinine‐derived urea catalyst has been achieved. One of the features of this work is that the easily available α, α‐difluoro/α‐monofluoro‐β‐ketoacids have been first applied in the enantioselective synthesis of fluorinated compounds as the masked fluoroenolates. Furthermore
Organocatalytic asymmetric synthesis of 3-difluoroalkyl 3-hydroxyoxindoles
作者:Yun-Lin Liu、Jian Zhou
DOI:10.1039/c2cc17140f
日期:——
We report the first example of highly enantioselective organocatalytic synthesis of 3-difluoroalkyl substituted 3-hydroxyoxindoles. The total synthesis of the difluoro analogue of convolutamydine E was achieved by this method.