Rapid Fluorous Stille Coupling Reactions Conducted under Microwave Irradiation
摘要:
Palladium-catalyzed fluorous Stille cross-coupling reactions with organic halides or triflates require only 90-120 s for completion when conducted under microwave irradiation. Comparable thermal reactions require about 1 day. Fourteen different coupling products were synthesized and isolated in good yields after three-phase extraction (FC-84, dichloromethane, water) and chromatography. The examples extend the scope of the fluorous Stille coupling with respect to both the tin and halide/triflate components. Applications in parallel synthesis are suggested.
Palladium-Catalyzed Stille Couplings with Fluorous Tin Reactants
作者:Masahide Hoshino、Peter Degenkolb、Dennis P. Curran
DOI:10.1021/jo9709413
日期:1997.11.1
A new class of "fluorous" aryl tin reactants was investigated for use in the Stille coupling. Fluorous compounds partition into a fluorocarbon (fluorous) phase in a fluorous/organic extraction. The coupling of tris[(perfluorohexyl)ethyl]phenyl tin [(C(6)F(13)CH(2)CH(2))(3)SnPh] with bromobenzene occurs smoothly in DMF/THF (1/1) at 80 degrees C in the presence of a catalytic amount of PdCl(2)(PPh(3))(2)
Stille Couplings with Fluorous Tin Reactants: Attractive Features for Preparative Organic Synthesis and Liquid-Phase Combinatorial Synthesis
作者:Dennis P. Curran、Masahide Hoshino
DOI:10.1021/jo961309x
日期:1996.1.1
Rapid Fluorous Stille Coupling Reactions Conducted under Microwave Irradiation
作者:Mats Larhed、Masahide Hoshino、Sabine Hadida、Dennis P. Curran、Anders Hallberg
DOI:10.1021/jo970362y
日期:1997.8.1
Palladium-catalyzed fluorous Stille cross-coupling reactions with organic halides or triflates require only 90-120 s for completion when conducted under microwave irradiation. Comparable thermal reactions require about 1 day. Fourteen different coupling products were synthesized and isolated in good yields after three-phase extraction (FC-84, dichloromethane, water) and chromatography. The examples extend the scope of the fluorous Stille coupling with respect to both the tin and halide/triflate components. Applications in parallel synthesis are suggested.