K2CO3/NaI-Induced Cyclization of ω-Bromo α-Cyano Ketones: A New Annulation Approach for the Formation of Carbalkoxycyclohexane Ring System
摘要:
An operationally simple and highly effective annulation process, making use of ZnCl2-catalyzed Michael addition and K2CO3/NaI-induced cyclization as key manipulations, has been developed to construct various bicyclic systems with a high level of functionalization valuable for further synthetic elaboration.
Double Michael Addition Reactions of the Nazarov Reagent with 2-Cyano-2-Cycloalkenones: An Alternative Approach to cis-Fused Bicyclic Systems
作者:Hsing-Jang Liu、Min-Tsang Hsieh、Che-Hao Tu、Yen-Ku Wu、Kak-Shan Shia、Sheng-Chu Kuo
DOI:10.1055/s-0033-1340299
日期:——
A highly stereoselective annulation reaction of 2-cyano-2-cycloalkenones with the Nazarov reagent catalyzed by 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU), leading to densely functionalized bicyclic systems, is developed.