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Somesimple furan derivatives are easily supplied from biomass. For example, furfural is available from such materials as oat husks and maize cobs, which are rich in pentosans. Pentoses and hexoses are converted by acid treatment into furfural and 5-hydroxymethylfurfural, respectively.X) The chemistry of furan, thus, is important to advance chemical uses of such renewable resource of carbohydrate. In addition, a number of naturally occurring furan derivatives which exhibit various biological activities are known.2) Some synthetic pyrethroid which are esters of chrysanthemic acid with 5-substituted furfuryl alcohols are known to have strong biological activities.3) We report here alkylation of 5-methyl-2furancarboxylic acid (1) and furfuryl alcohol (6) and its

Facile synthesis of 2,5-disubstituted furan derivatives and its application for the synthesis of pyrethroid.