Triflic Acid-Catalyzed Enynes Cyclization: A New Strategy beyond Electrophilic π-Activation
作者:Zhunzhun Yu、Lu Liu、Junliang Zhang
DOI:10.1002/chem.201601599
日期:2016.6.13
The cyclization of enynes, catalyzed by a transition metal, represents a powerful tool to construct an array of cyclic compounds through electrophilic π‐activation. In this paper, we disclose a new and efficient strategy for enynes cyclizationcatalyzed by triflic acid. The salient features of this transformation includes a broad substrate scope, metal free synthesis, open flask and mild conditions
作者:Connor Yap、Gabriel M. J. Lenagh-Snow、Somnath Narayan Karad、William Lewis、Louis J. Diorazio、Hon Wai Lam
DOI:10.1002/anie.201703380
日期:2017.7.3
Enantioselective nickel-catalyzed arylative cyclizations of substrates containing a Z-allylic phosphate tethered to an alkyne are described. These reactions give multisubstituted chiral aza- and carbocycles, and are initiated by the addition of an arylboronic acid to the alkyne, followed by cyclization of the resulting alkenylnickel species onto the allylic phosphate. The reversible E/Z isomerization