Highly regio- and stereo-controlled Pd(0)-catalyzed nucleophilic substitution reaction for the synthesis of optically active γ-fluoroalkylated allylic alcohols
作者:Tsutomu Konno、Takashi Ishihara、Hiroki Yamanaka
DOI:10.1016/s0040-4039(00)01485-4
日期:2000.10
Pd(0)-catalyzed nucleophilicsubstitution reaction of opticallyactive α-(fluoroalkyl)allyl mesylates with various types of carboxylates proceeded regioselectively to afford the corresponding chiral γ-fluoroalkylated allylic alcohol derivatives in excellent yields without any loss of optical purities.
A novel and expedient synthesis of optically active fluoroalkylated amino acids via palladium-catalyzed allylic rearrangement and Ireland–Claisen rearrangement
chiral α-fluoroalkylated mesylates with carboxylic acids in the presence of a palladium catalyst proceeded smoothly to give γ-fluoroalkylated allyl esters in excellent yields. The esters were subsequently subjected to Ireland–Claisen rearrangement without isolation, leading to the corresponding homochiral α-fluoroalkylated-β,γ-unsaturated amino acids in good yields.
with various carboxylates and amines in the presence of tetrakis(triphenylphosphine)palladium(0) catalyst to give the corresponding gamma-fluoroalkylated (E)-allylic alcoholderivatives and amines, respectively, in excellent yields. In almost all cases, no other regio- and stereoisomers were produced. Application of this palladium-catalyzedallylic substitution reaction to various nonracemic mesylates