Furopyridines.<b>XV</b>. Synthesis and properties of ethyl 2-(3-furo[2,3-<i>b</i>]-, -[3,2-<i>b</i>]-, -[2,3-<i>c</i>]- and -[3,2-<i>c</i>]pyridyl)acetate
Wittig-Horner reaction with diethyl cyanomethylphosphonate, hydrolysis and the subsequent esterification. Reaction of compounds 10a-d with lithium diisopropylamide (IDA) gave the corresponding methylene-lithiated intermediate, and the subsequent reaction with benzaldehyde, acetone and iodomethane afforded the methylene-alkylated product respectively, while N,N-dimethylacetamide did not give any reaction product