In this review, the pivotal achievements and recent advances in catalytic asymmetric aza‐
DAR reported up to 2020 are retrospectively considered and their potency for …

For over a century, ketenes have intrigued organic chemists with their unusual physical
properties and unique spectrum of chemical reactivity; it is not an exaggeration to say that …

A number of oxygen heterocycles were synthesized using the palladium-catalyzed
intramolecular etherification of aryl halides by employing di-tert-butylphosphinobiaryl …

A tandem allylic amination/oxa-Michael addition of vinyl methylene cyclic carbonates
(VMCCs) has been developed to construct heterocycles by single palladium catalysis or …

The 2H-1, 4-benzoxazin-3-(4H)-one (1) and 3, 4-dihydro-2H-1, 4-benzoxazine (2) scaffolds
have been studied intensively as important heterocyclic systems for building natural 1, 2 and …

Norbergenin, which is the O-demethyl derivative of bergenin, the main component of
Mallotus japonicus, has been found to show moderate antioxidant activity (IC50 13μM in …

Several years ago we reported on the intramolecular cyclization of tertiary alcohols to form
five-and six-membered oxygen heterocycles (Scheme 1). 1, 2 The optimal cyclization …

A series of 8-alkylamino-5, 7-dihydroxyflavones was prepared from chrysine via a seven
step sequence. The synthesis of their 6-alkylamino isomers could be subsequently …

An operationally simple domino approach for the silver-catalyzed synthesis of
oxazine/benzoxazine-fused isoquinolines 5a–q and naphthyridines 6a–v by the reaction of …

2-(4, 5-Dihydro-1 H-imidazol-2-yl)-3, 4-dihydro-2 H-1, 4-benzoxazine derivatives and
tricyclic analogues with a fused additional ring on the nitrogen atom of the benzoxazine …