Synthesis of functionalized 1-methylchromeno[3,4-b]pyrrol-4(3H)-ones via the Barton–Zard reaction starting from pseudonitrosites
作者:Daniil А. Rusanov、Alexander V. Samet、Vyacheslav V. Rusak、Victor V. Semenov
DOI:10.1007/s10593-021-03004-3
日期:2021.9
A method for the preparation of chromeno[3,4-b]pyrrol-4(3H)-ones via the synthesis of the corresponding 3-arylpyrrole-2-carboxylates from pseudonitrosites by the Barton–Zard reaction was developed. As a result of selective O-demethylation upon exposure to BBr3, the lactone ring closes with the formation of substituted chromeno[3,4-b]pyrrolones in moderate yields.
一种色烯的制备方法[3,4 b ]吡咯-4-(3 ħ) -酮通过相应的从由巴顿ZARD反应pseudonitrosites 3-芳基吡咯-2-羧酸酯的合成被开发。由于在暴露于 BBr 3时选择性O-去甲基化,内酯环闭合,形成中等产率的取代的色诺[3,4- b ]吡咯酮。