Stereoselective Kinugasa/Aldol Cyclization: Synthesis of Enantioenriched Spirocyclic β-Lactams
作者:Alexa Torelli、Eun Seo Choi、Aurélien Dupeux、Marcel Nicolas Perner、Mark Lautens
DOI:10.1021/acs.orglett.3c03534
日期:2023.12.1
We report an enantioselective copper-catalyzed Kinugasa/aldol domino reaction. This strategy enables access to a range of spirocyclic β-lactam pyrrolidinones in a stereoselective fashion. Under mild reaction conditions, prochiral alkyne-tethered ketones are coupled with nitrones to enable the facile construction of two spirofused ring systems containing three continuous stereocenters with excellent
Silver(I)‐Catalyzed Conia‐Ene Reaction: Synthesis of 3‐Pyrrolines
<i>via</i>
a 5‐
<i>endo</i>
‐
<i>dig</i>
Cyclization
作者:Siva Senthil Kumar Boominathan、Wan‐Ping Hu、Gopal Chandru Senadi、Jeh‐Jeng Wang
DOI:10.1002/adsc.201300844
日期:2013.12.16
AbstractA novel method has been developed for the synthesis of 3‐pyrrolines from β‐ketopropargylamines via a 5‐endo‐dig carbocyclization. This transformation involves a silver‐catalyzed Conia‐ene type reaction tolerating broad substrate scope with good to excellent yields. Furthermore, this methodology has been extended for the construction of 2‐substituted pyrroles under base‐mediated conditions.magnified image