PHOTOCHEMICAL SYNTHESIS OF 1<i>H</i>-PYRANO[3,4-<i>c</i>] PYRIDIN-8[7<i>H</i>]-ONE AND RELATED COMPOUNDS
作者:Chikara Kaneko、Yu Momose、Toshihiko Naito
DOI:10.1246/cl.1982.1361
日期:1982.9.5
3-Unsubstituted 4-acetoxy- or 4-methoxy-2-pyridones react photochemically with diethyl acetal of acrolein in acetone. Base treatment of the resultant head-to-tail adducts led to 1,2-dihydrocyclobuta[c]pyridin-3 (4H) -ones having the acetal function at the 1-position. Refluxing of these cyclobutenes in aq. acetic acid resulted in the formation of the title compounds, whose framework is common in the
3-未取代的 4-乙酰氧基-或 4-甲氧基-2-吡啶酮在丙酮中与丙烯醛的二乙缩醛发生光化学反应。所得头对尾加合物的碱处理导致 1,2-二氢环丁 [c] 吡啶-3 (4H) - 在 1-位具有缩醛功能。这些环丁烯在水溶液中的回流。乙酸导致形成标题化合物,其骨架常见于龙胆属物种中所含的生物碱以及一些吲哚和相关生物碱的非色胺单元中。