Xanthones are important O-heteroaromatic tricyclic molecules exhibiting a wide range of
bioactivities and can represent a showcase to highlight the recent techniques and strategies …

Compounds containing oxygen, nitrogen, or sulfur atoms inside the rings are attracting much
attention and interest due to their biological importance. In recent years, several methods for …

A highly efficient [4+ 2] annulation route to polysubstituted indolizines is described
employing a domino Knoevenagel condensation/intramolecular aldol cyclization process as …

New derivative of heteroannulated chromone identified as 5-methyl-8 H-benzo [h] chromeno
[2, 3-b][1, 6] naphthyridine-6 (5H), 8-dione (5, MBCND) was easily and efficiently …

A pseudo-three-component annulation reaction of substituted 2-amino-4 H-chromen-4-ones
with aromatic aldehydes promoted by DBU was investigated to access polysubstituted 5 H …

Under the green chemistry perspective, bis [(l) prolinate-N, O] Zn (also called zinc–proline or
Zn [(l)-pro] 2) has proven its competence as a promising alternative in a plethora of …

A new silver-mediated highly selective C–H functionalization of 2-alkylazaarenes with
internal and terminal alkynes for the creation of substituted indolizines in one-pot has been …

A DDQ-mediated tandem annulation of 2-aminochromones with 1, 3-diarylpropenes is
disclosed, which provides the azaxanthones in moderate to good yields. The oxidative …

New series of heteroannulated chromeno [2, 3‐b] pyridines were easily and efficiently
synthesized from DBU‐catalyzed condensation of 2‐amino‐6‐methylchromone‐3 …

Résumé A novel, greener approach was adopted for the synthesis of 3, 4-dihydropyrimidin-2
(1H)-one derivatives (4a–i) using bis [(L) prolinato-N, O] Zn as an inexpensive, efficient and …