Synthesis of 1,2,3,4-tetrahydro-5<i>H</i>-[1]benzopyrano[3,4-<i>c</i>]pyridin-5-ones. I. 3-unsubstituted compounds
作者:David T. Connor、Paul C. Unangst、Charles F. Schwender、Roderick J. Sorenson、Mary E. Carethers、Chester Puchalski、Richard E. Brown
DOI:10.1002/jhet.5570210563
日期:1984.9
Synthesis of 1,2,3,4-tetrahydro-5H-[1]benzopyrano[3,4-c]pyridin-5-ones via a Pechmann condensation of 3-carbethoxy-1-methyl-4-piperidone with various phenols is described. The limitations of this method are discussed. Synthesis of the parent ring system 3a via reduction of 1,2,3,4-tetrahydro-3-(phenylmethyl)-8-[(1-phenyl-1H-tetrazol-5-yl)oxy]-5H-[1]benzopyrano[3,4-c]pyridin-5-one (5) is also described
通过3-碳乙氧基-1-甲基-4-哌啶酮与各种酚的Pechmann缩合反应合成1,2,3,4-四氢-5 H- [1]苯并吡喃并[3,4- c ]吡啶-5-描述。讨论了该方法的局限性。母环系统的合成图3a经由还原的1,2,3,4-四氢-3-(苯基甲基)-8 - [(1-苯基-1- ħ -四唑-5-基)氧基] -5- ħ - [还描述了1]苯并吡喃并[3,4- c ]吡啶-5-一(5)。