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
作者:Shunsaku Shiotani、Masahiko Tsuno、Noriyasu Tanaka、Miho Tsuiki、Makoto Itoh
DOI:10.1002/jhet.5570320122
日期:1995.1
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
通过呋喃啶-3(2 H)-酮4a-d与氰基甲基膦酸二乙酯的Wittig-Horner反应,水解和随后的酯化反应,由呋喃吡啶-3(2 H)-酮4a-d合成2-(3-呋喃吡啶基)乙酸乙酯10a-d。化合物10a-d与二异丙基氨基锂(IDA)反应,得到相应的亚甲基锂化的中间体,随后与苯甲醛,丙酮和碘甲烷的反应分别得到亚甲基烷基化的产物,而N,N-二甲基乙酰胺未得到任何反应产物。 。10a,b和d的2位通过锂化与过量的LDA进行烷基化,然后与亲电试剂连续反应。