Dodecanethiol esters derived from odorless dodecanethiol proved to be suitable substrates for Pd-catalyzed reduction with triethylsilane, coupling with organozinc reagents, and coupling with terminal acetylenes.
A new method for synthesizing α,β-acetylenic ketones by palladium-mediated coupling of thiol esters with 1-alkynes is described. The reaction could be applied to coupling of thiol esters bearing various functional groups,such as aromatic bromides, and ketones, with functionalized terminal acetylenes.
A Practical Synthesis of Multifunctional Ketones through the Fukuyama Coupling Reaction
作者:Yoshikazu Mori、Masahiko Seki
DOI:10.1002/adsc.200600610
日期:2007.8.6
A highly efficient, robust and scalable protocol for the synthesis of multifunctional ketones through Fukuyama coupling, i.e., cross-coupling of thiol esters with zinc reagents, has been developed. Treatment of thiol esters with alkylzinc iodides or dialkyl zincs in the presence of palladium on activated carbon (Pd/C) or palladium acetate [Pd(OAc)2] furnished the corresponding ketones in high yields
SYNTHESIS OF MULTI-FUNCTIONALIZED KETONES THROUGH THE FUKUYAMA COUPLING REACTION CATALYZED BY PEARLMAN'S CATALYST: PREPARATION OF ETHYL 6-OXOTRIDECANOATE
A novel procedure for the synthesis of multifunctional ketones through the Fukuyama coupling reaction employing dialkylzincs
作者:Yoshikazu Mori、Masahiko Seki
DOI:10.1016/j.tetlet.2004.07.148
日期:2004.9
Treatment of thiol esters 1 with dialkylzincs 2 in the presence of zinc bromide, that was in situ prepared from zinc dust and bromine, provided various functionalized ketones 3 in high yields. The reaction mechanism, which may shift the Schlenk equilibrium from dialkylzincs 2 to reactive alkylzinc bromide 5, was postulated to account for the facile coupling reaction. (C) 2004 Elsevier Ltd. All rights reserved.