The first DMAP-mediated palladium-free Tsuji–Trost-type reaction of cyclic and acyclic Baylis–Hillman alcohols with active methylene compounds
作者:Olfa Mhasni、Farhat Rezgui
DOI:10.1016/j.tetlet.2009.11.053
日期:2010.1
Direct allylic substitution of cyclic Baylis–Hillman alcohols with active methylene compounds under modified Taber’s conditions (DMAP, toluene, reflux, 4 Å molecular sieves), with no Pd catalysts/activating agents, as is usually required for the process, affords the C-allylation products in moderate to good yields.
Et<sub>3</sub>B-mediated and palladium-catalyzed direct allylation of β-dicarbonyl compounds with Morita–Baylis–Hillman alcohols
作者:Ahlem Abidi、Yosra Oueslati、Farhat Rezgui
DOI:10.3762/bjoc.12.234
日期:——
A practical and efficient palladium-catalyzed direct allylation of beta-dicarbonylcompounds with both cyclic and acyclic Morita-Baylis-Hillman (MBH) alcohols, using Et3B as a Lewis acid promoter, is described herein. A wide range of the corresponding functionalized allylated derivatives have been obtained in good yields and with high selectivity.
Silver-catalyzed oxidative 1,2-alkyletherification of unactivated alkenes with α-bromoalkyl carbonyls: facile access to highly substituted 2,3-dihydrofurans
作者:Wen-Ting Wei、Mu-Jia Luo、Fan Teng、Ren-Jie Song、Jin-Heng Li
DOI:10.1039/c9cc05695e
日期:——
A new, general silver-catalyzed oxidative 1,2-alkyletherification of unactivated olefinic ketones with primary, secondary and tertiary α-bromoalkyl carbonyls promoted by tert-butyl hydroperoxide (TBHP) and Et3N has been developed. Through the cooperative action of Ag2O, TBHP and Et3N, the reaction enables the construction of highly valuable quaternary-carbon-possessing 2,3-dihydrofuran frameworks using