Detrifluoroacetylation Reaction of Trifluoromethyl-β-diketones: Facile Method for the Synthesis of Succinimide Derivatives and 1,4-Diketones
作者:Li-Hua Wang、Jing Zhao
DOI:10.1002/ejoc.201800680
日期:2018.8.23
A detrifluoroacetylation of trifluoromethyl‐β‐diketones has been developed, which allows for the synthesis of succinimides and 1,4‐diketones through cascade Michael addition/retro‐Claisen reaction and nucleophilic substitution/retro‐Claisen reaction.
An efficient and convenientsynthesis for mono-fluoroalkyl reagents α-halo-α-fluoroketones, including α-iodo-α-fluoroketones, α-bromo-α-fluoroketones and α-chloro-α-fluoroketones was reported by using the Wu–Colby's protocol involving the release of trifluoroacetate.
AbstractA Fe(II)‐catalyzed three‐component reaction of 2‐iodo‐2,2‐difluoroacetophenones, alkenes and TMSN3 is described, which provides a particularly valuable route to access difluoroalkylated azides with high yields. The method permits the efficient azidation of varied β‐difluoroacyl‐benzylic radicals in mild conditions with high functional group tolerance. Preliminary mechanistic investigation indicated that a radical‐mediated process was involved in this azidadifluoroacylation reaction.