Cascade cyclization of methyl 2-(azidomethyl)furan-3-carboxylate with 2-cyanoacetamides in the presence of 2 equiv of potassium tert-butoxide afforded a series of N-substituted 5-oxo-5,9-dihydro-4H-furo-[3,2-e][1,2,3]triazolo[1,5-a][1,3]diazepine-3-carboxamides.
级联甲基环化2-(
叠氮基甲基)
呋喃-3-
羧酸乙酯与2-
氰基乙酰胺在2当量的
钾的存在下
叔丁醇,得到一系列Ñ取代5-氧代-5,9-二氢-4-氧代ħ
呋喃并-[3,2- e ] [1,2,3]三唑并[1,5- a ] [1,3]二氮杂-3-甲酰胺。