Azlactones, also known as oxazolones, are versatile building blocks in organic synthesis
due to the presence of multiple pro‐nucleophilic and electrophilic reactive sites. Recently …

Chiral analogues of squaramides have been fruitful in organocatalyzed asymmetric
reactions over last decade. Alongside other H‐bonding catalysts like ureas, thioureas …

The diastereo-and enantioselective tandem cycloisomerization/[4+ 2]-cycloaddition reaction
of cyclopropyl tethered allenyl ketones with α, β-unsaturated carbonyl compounds was …

H-bonding catalysis has attracted much attention in asymmetric reactions. Taking advantage
of guanidine-amides as bifunctional organocatalysts, we successfully achieved cyclization …

An asymmetric cyclization reaction of azadienes and azlactones was investigated by
employing a Cinchona squaramide catalyst, which could afford a series of benzofuran-fused …

An organocatalytic asymmetric domino Mannich/cyclization reaction between 2-
benzothiazolimines with azlactones has been successfully developed. With the bifunctional …

A vinylogous addition–cyclization reaction of cyclic α-amide enones with good yields and
excellent regioselectivity catalyzed by cinchona squaramides has been reported. Using 4 …

Abstract Chiral bis‐oxalamide (CBOA)/rare‐earth metal complexes‐catalyzed asymmetric
inverse‐electron‐demand oxa‐hetero‐Diels‐Alder (HDA) reactions were investigated under …

The construction of cyclobutanes has attracted much attention because of its unique four-
membered ring skeleton. Herein, we report the highly enantioselective direct vinylogous …

Five‐membered heterocycles bearing an exocyclic double bond have been successfully
used as substrates in asymmetric addition and cycloaddition reactions. Ylidene …