Acetic aldehyde in multicomponent synthesis of azolopyrimidine derivatives in water
作者:Irina G. Tkachenko、Sergey A. Komykhov、Eugene S. Gladkov、Vladimir I. Musatov、Valentyn A. Chebanov、Sergey M. Desenko
DOI:10.1007/s10593-019-02470-0
日期:2019.5
Three-component reaction of 3-amino-1H-1,2,4-triazole or 5-amino-2H-1,2,3-triazole derivatives, acetaldehyde, and 1,3-dicarbonyl compounds (acetylacetone or β-keto esters) in water under microwave irradiation leads to regioselective formation of 4,7-dihydro[1,2,4]-triazolo- and 4,7-dihydro[1,2,3]triazolo[1,5-a]pyrimidines. Using ethyl 4,4,4-trifluoro-3-oxobutanoate as 1,3-dicarbonyl compound under the same
3-氨基-1 H -1,2,4-三唑或5-氨基-2 H -1,2,3-三唑衍生物,乙醛和1,3-二羰基化合物(乙酰丙酮或β-在微波辐射下在水中的酮酯)导致区域选择性形成4,7-二氢[1,2,4]-三唑-和4,7-二氢[1,2,3]三唑[1,5- a ]嘧啶。在相同条件下使用4,4,4-三氟-3-氧代丁酸乙酯作为1,3-二羰基化合物可以得到相应的5-羟基-4,5,6,7-四氢衍生物,其在乙醇中不能脱水。反应介质。