Cobalt-Catalyzed Olefinic C–H Alkenylation/Alkylation Switched by Carbonyl Groups
摘要:
The first cobalt-catalyzed cross-couplings between olefins has been demonstrated to provide C(alkenyl)-H alkenylation and alkylation products, using complex [Cp*Co(CO)I-2]. While coupling partner acrylates afforded conjugated dienoates, alpha,beta-unsaturated ketones led to gamma-alkenyl ketones completely, representing a switchable C-H functionalization controlled by different carbonyl groups.
Cobalt-Catalyzed Olefinic C–H Alkenylation/Alkylation Switched by Carbonyl Groups
摘要:
The first cobalt-catalyzed cross-couplings between olefins has been demonstrated to provide C(alkenyl)-H alkenylation and alkylation products, using complex [Cp*Co(CO)I-2]. While coupling partner acrylates afforded conjugated dienoates, alpha,beta-unsaturated ketones led to gamma-alkenyl ketones completely, representing a switchable C-H functionalization controlled by different carbonyl groups.
Aminocarbonylations of alkenyl phosphates, chlorides, bromides, and triflates with Mo(CO)6 as a solid CO source
作者:Olof Lagerlund、Mette L.H. Mantel、Mats Larhed
DOI:10.1016/j.tet.2009.06.101
日期:2009.9
Palladium-catalyzedaminocarbonylations of alkenyl chlorides, bromides, and triflates were investigated using Mo(CO)6 as a solid carbonmonoxidesource. The reactions afforded moderate to good yields producing a wide variety of acrylamides after 20 min of microwave irradiation. In addition, the aminocarbonylationreaction was, for the first time, expanded to include alkenyl phosphates as starting materials