Ring switching tricomponent synthesis of pyrano[2,3-b]pyridine multifunctional derivatives
作者:Boris V. Paponov、Danil A. Rakityansky、Marina S. Samokhvalova、Gleb L. Denisov、Andrey Yu. Potapov、Khidmet S. Shikhaliev
DOI:10.1016/j.mencom.2021.04.041
日期:2021.5
New 3-acylamino-7-hydroxy-5-methyl-2-oxo-2H-pyrano[2,3-b]pyridine-6-carbonitriles were synthesized via a tricomponent condensation of 3-cyano-4-methyl-1,2,5,6-tetrahydropyridine-2,6-dione, triethyl orthoformate and N-acylglycines under the Erlenmeyer–Plöchl reaction conditions. According to X-ray data, in the solid phase they exist as hydroxypyridine tautomer form.
通过3-cyano-4-methyl-1 的三组分缩合合成了新的 3-acylamino-7-hydroxy-5-methyl-2-oxo-2 H - pyrano[2,3 - b ]pyridine-6- carbonitriles ,在 Erlenmeyer-Plöchl 反应条件下,2,5,6-四氢吡啶-2,6-二酮、原甲酸三乙酯和N-酰基甘氨酸。根据 X 射线数据,它们在固相中以羟基吡啶互变异构体形式存在。