Yb modified NaY zeolite: A recyclable and efficient catalyst for quinoxaline synthesis

In this study, Yb immobilized NaY zeolite catalyst（Yb/NaY） was obtained by a hydrothermal method and characterized by XRD, BET, FT-IR, ICP-AES, and NH3-TPD. The catalyst displayed good catalytic activity when applied to the synthesis of quinoxalines via condensation of a-hydroxyketones with 1,2-diamines,and could be reused several times without any loss of catalytic activity.

Yttrium-catalyzed heterocyclic formation via aerobic oxygenation:A green approach to benzothiazoles

The YCl3-catalyzed aerobic oxidative cyclization reaction for the synthesis of benzothiazoles has been developed. This method provides a practical, effective and green synthetic approach to benzothiazoles which are important units in many biologically active compounds.

Y(OTf)_3-catalyzed heterocyclic formation via aerobic oxygenation:An approach to dihydro quinazolinones and quinazolinones

The Y（OTf）3-catalyzed aerobic oxidative cyclization reaction for the selective synthesis of dihydroqui- nazolinones and quinazolinones has been developed. This method provides a practical, effective and green synthetic approach to dihydroquinazolinones and quinazolinones which both are important units in many biologically active compounds.