Research Article

Synthesis of Polyfunctionalized 4H-Pyrans

Table 1

Screening of solvents.a

785930.tab.001

EntrySolventIsolated Yield (%)

1No solvent0
2Dichloromethane15
3Chloroform12
4Acetonitrile33
5DMF40
6Ethanol85
7Water0

aReaction conditions: stoichiometric ratio of all the reactants with base (30 mg/mmol) in ethanol at RT for 5 h.