Nano-ZnO as heterogeneous catalyst for three-component one-pot synthesis of tetrahydrobenzo[b]pyrans in water

作者：Hosseini Sarvari M^*; Shafiee Haghighi S

来源：Chemistry of Heterocyclic Compounds, 2012, 48(9): 1307-1313.

DOI：10.1007/s10593-012-1137-5

• activated methylenes
• arylaldehydes
• nano-ZnO
• tetrahydrobenzo[b]pyrans
• water
• multicomponent reactions

Nano-ZnO is reported as an extremely efficient heterogeneous catalyst for the synthesis of tetrahydrobenzo[b]pyrans. A three-component one-pot reaction of arylaldehydes, activated methylenes, and 1,3-diketones took place in water to afford the corresponding tetrahydrobenzo[b]pyrans in good to high yields in the presence of nano-ZnO. Furthermore, the catalyst could be reused for several times without any significant loss of its catalytic activity.

• 出版日期2012-12