Solid-phase synthesis of 1,4-diketones by thiazolium salt promoted addition of aldehydes to chalcones
摘要:
The first report of thiazolium salt promoted Michael addition of aldehydes to chalcones (Stetter reaction) on solid-phase is reported. Reaction conditions have also been devised for cleaving the product 1,4-diketone from the solid-support in good yield and high purity. (C) 2002 Elsevier Science Ltd. All rights reserved.
Solid-phase synthesis of 1,4-diketones by thiazolium salt promoted addition of aldehydes to chalcones
作者:Sadagopan Raghavan、Kancharla Anuradha
DOI:10.1016/s0040-4039(02)00972-3
日期:2002.7
The first report of thiazolium salt promoted Michael addition of aldehydes to chalcones (Stetter reaction) on solid-phase is reported. Reaction conditions have also been devised for cleaving the product 1,4-diketone from the solid-support in good yield and high purity. (C) 2002 Elsevier Science Ltd. All rights reserved.
Bi(OTf) 3 /[bmim]BF 4 as novel and reusable catalytic system for the synthesis of furan, pyrrole and thiophene derivatives
Bi(OTf)3 immobilized in 1-butyl-3-methylimidazolium tetrafluoroborate [bmim]BF4 has been utilized for the first time as a novel and reusable catalyticsystem for the synthesis of heteroaromatics such as furan, pyrrole and thiophene derivatives from 1,4-diketones. This new procedure offers significant improvements in reaction rates and yields. The recovered ionic liquid containing bismuth triflate can