cyclocondensation of 1,4‐disubstituted 2‐amino‐3‐cyanopyrrole 1 with formic acid. When comparative study of N versus O alkylation of ambident 5,7‐disubstituted 7H‐pyrrolo[2,3‐d]pyrimidin‐4(3H)‐ones 2 was carried out under liquid–liquid PTC, solid–liquid PTC, and solid–liquid solvent free conditions using various alkylating agents 3, the N‐alkylated product 4 were obtained selectively and exclusively.
1,7-二取代的7H-
吡咯并[2,3-d]
嘧啶-4(3H)-ones 2是通过1,4-二取代的2-
氨基-
3-氰基吡咯1与
甲酸的环缩合反应合成的。在液-液
PTC,固-液
PTC和固体条件下进行环境5,7-二取代的7H-
吡咯并[2,3-d]
嘧啶-4(3H)-ones 2的N与O烷基化反应的比较研究时–使用各种烷基化剂3的无液体溶剂条件,N烷基化产物4是有选择地和排他地获得的。