Regioselective Synthesis of Multisubstituted Benzenes by Palladium-Catalyzed Intermolecular Reaction of β-Iodo-β-silylstyrenes with Alkynes
摘要:
The Pd-catalyzed reaction between beta-iodo-beta-silyistyrenes and terminal alkynes in i-Pr2NEt gave 1,2,3,5-tetrasubstituted benzenes with complete regioselection. The use of certain silylacetylenes as alkynes enabled efficient synthesis of 1,3,5-trissilyl-2-arylbenzenes, which could be transformed into other multisubstituted benzenes by displacement of the silyl groups.
Regioselective Synthesis of Multisubstituted Benzenes by Palladium-Catalyzed Intermolecular Reaction of β-Iodo-β-silylstyrenes with Alkynes
摘要:
The Pd-catalyzed reaction between beta-iodo-beta-silyistyrenes and terminal alkynes in i-Pr2NEt gave 1,2,3,5-tetrasubstituted benzenes with complete regioselection. The use of certain silylacetylenes as alkynes enabled efficient synthesis of 1,3,5-trissilyl-2-arylbenzenes, which could be transformed into other multisubstituted benzenes by displacement of the silyl groups.
The cobalt-catalyzed aza-NHK (Nozaki–Hiyama–Kishi) reaction of ketimine has been realized to access diverse α-tertiary vinylic amino esters with excellent enantioselectivity and broad functional group tolerance. Notably, both configuration of alkenyl halide provides the same stereochemical outcome of chiral α-alkenyl quaternary amino ester, indicating that isomerization of alkenyl fragment might be