Syntheses of Furo[3,2-e][1,2,4]triazolo[1,5-c]pyrimidines and Furo[2`,3`: 5,6]-pyrimido[3,4-b][2,3-e]indolo[1,2,4]triazine as a New Ring System
作者:Nasser Hassan
DOI:10.3390/50600826
日期:——
to afford the corresponding 2-ethoxyimine derivative (2). The latter compound reacted with phenyl hydrazine, p-fluorobenzylamine and sodium hydrogen sulfide, respectively, to afford the corresponding furo[2,3-d]pyrimidine derivatives (3-5). Compound 1 also reacted with carbon disulfide and phenyl isocyanate to afford 5,6-di-(2-furyl)-1H-4H-furo[2,3-d]-[1,3-thiazin]-4-imino-2-thione (6) and 5,6-di-(2
2-氨基-4,5-二-(2-呋喃基)呋喃-3-甲腈(1)与原乙酸三乙酯反应得到相应的2-乙氧基亚胺衍生物(2)。后一种化合物分别与苯肼、对氟苄胺和硫化氢钠反应,得到相应的呋喃[2,3-d]嘧啶衍生物(3-5)。化合物1也与二硫化碳和异氰酸苯酯反应得到5,6-二-(2-呋喃基)-1H-4H-呋喃[2,3-d]-[1,3-噻嗪]-4-亚氨基-2 -硫酮 (6) 和 5,6-二-(2-呋喃基)-1H-3H-3-苯基呋喃[2,3-d]嘧啶-4-亚胺-2-one (7),分别。在 0°C 下用水合肼处理化合物 2 得到化合物 8,同时沸腾 5,6-二-(2-呋喃基)-3H,4H-4-亚氨基-2-甲基呋喃-[2,3-d]嘧啶-3分离出-胺(9)。用二硫化碳、溴化氰、氰乙酸乙酯处理9,草酸二乙酯和原甲酸三乙酯得到相应的呋喃[3,2-e][1,2,4]三唑并[1,5-c]嘧啶(10-14)。9与靛红和N-