Stereocontrolled Synthesis of <i>Z</i>-Dienes via an Unexpected Pericyclic Cascade Rearrangement of 5-Amino-2,4-pentadienals
作者:Sarah E. Steinhardt、Joel S. Silverston、Christopher D. Vanderwal
DOI:10.1021/ja8028125
日期:2008.6.18
Donor-acceptor dienes known as Zincke aldehydes, which derive readily from the ring-opening reactions of pyridinium salts with secondary amines, undergo a fascinating thermal rearrangement reaction to afford Z-alpha,beta,gamma,delta-unsaturated amides with excellent stereoselectivity. Efficient, stereocontrolled access to Z-trisubstituted alkenes with two different substitution patterns is possible
Effect of Transition Metals on Chemodivergent Cross-Coupling of Acrylamides with Vinyl Acetate via C–H Activation
作者:Ravichandran Logeswaran、Masilamani Jeganmohan
DOI:10.1021/acs.orglett.1c01797
日期:2021.8.6
A novel chemodivergent cross-coupling of acrylamides and vinyl acetates has been realized via metal-catalyzed vinylicC–Hactivation. The selective olefinic C–Hvinylation and alkenylation reaction was examined with a variety of differently functionalized acrylamides. The reaction efficiently generates a range of highly synthetically valuable butadienes with good functional group tolerance in good