Fig.1 Photographs of TiO2 nanospheres (a) before doping.doc

(a)beforedopingand(b).******@N-dopedTiO2Fig.******@N-dopedTiO2Fig.******@N-dopedTiO2Fig.******@N-dopedTiO2Fig.******@N-dopedTiO2Fig.******@N-dopedTiO2Fig.******@N-dopedTiO2Fig.******@N-dopedTiO2,Reactionconditions:Benzaldehyde(1mmol),ethylcyanoacetate(1mmol),barbituricacid(1mmol),nanocatalyst()inMeOH(8-10mL)at65oCfor1hFig.******@N-dopedTiO2,Reactionconditions:Benzaldehyde(1mmol),dimedone(2mmol),nanocatalyst()inEtOH(8-10mL)(%)Atomic(%).******@N-(1mmol),ethylcyanoacetate(1mmol),barbituricacid(1mmol)and0.******@N-(oC)Time(h)%-freeSolvent-freeSolvent-**********---407090--4560Table3.******@N-(h)%-.******@N-******@N-dopedTiO2withotherreportedcatalystsfortheone-potsynthesisofpyrano[2,3-d](h)%YieldDrawbackDABCO(5mol%)46H2O:EtOH384-97Longerreactiontime,lowyields([Bmim]BF4)3290oC146-84Verylowyields,harshreactionconditionsAl-HMS-2033EtOH,\ZrO234EtOH:H2O,-******@N-dopedTiO2(presentwork)MeOH,65oC,reflux190Easywork-up,recyclablecatalyst,lesserperiodoftime,mildreactionconditions,goodtoexcellentyieldsTable5.******@N-dopedTiO2catalyzedone-potsynthesisofpyrano[2,3-d]pyrimidinesaEntry ArArProductTime(min.)Yield(%).