the National Key Technology R&D Program(No.2007BAI34B00);the National Natural Science Foundation of China(No.20876147 and 20676123);the Natural Science Foundation of Zhejiang Province(No.Y4080107) for financial support.
A Yb(OTf)3-catalyzed approach for the synthesis of pyrroles under solvent-free conditions was achieved, which could afford the desired products with yields ranged from moderate to excellent.
the National Natural Science Foundation of China (No.20676123) for financial support.
Catalyzed by ytterbium(III) triflate hydrate [Yb(OTf)3.xH20], the Michael addition and cyclocondensation of α,β-unsaturated ketones with active methylene compounds to afford the 1,4-adducts and benzo[b]pyran der...
We are grateful to the National Basic Research Program (No. 2003CB114402);the National Natural Science Foundation of China (Nos. 20476098 and 20676123) ;Wenzhou University Post-graduate Innovation Foundation (No. YCX0515) for financial support.
2,3-Dihydro-2-aryl-4(1H)-quinazolinones were prepared in good yields via condensation of o-aminobenzamide with aldehydes promoted by a catalytic amount of Sc(OTf)3 under mild conditions.