✍ Scribed by Da-Qing Shi; Hao Yao
No coin nor oath required. For personal study only.
magnified image A series of 4‐aryl‐3‐methyl‐1‐phenyl‐7__H__‐furo[3,4‐e]pyrazolo[3,4‐b]pyridine‐5‐ones were synthesized via the three‐component reaction of an aldehyde, 5‐amino‐3‐methyl‐1‐phenyl‐1__H__‐pyrazole and tetronic acid in aqueous media in the presence of triethylbenzylammonium chloride (TEBAC). This method has the advantages of easier work‐up, mild reaction conditions, high yields, and an environmentally benign procedure. J. Heterocyclic Chem., (2009).
📜 SIMILAR VOLUMES
## Abstract A series of 4‐aryl‐3,7,7‐trimethyl‐1‐phenyl‐7,8‐dihydro‐1__H__‐pyrazolo[3,4‐__b__]quinolin‐ 5(6__H__)‐ones were synthesized by the three‐component reaction of aromatic aldehydes, 3‐methyl‐1‐phenyl‐1__H__‐pyrazol‐5‐amine, and 5,5‐dimethyl‐1,3‐cyclohexandione in the presence of sodium 1‐d
## Abstract magnified image A series of furo[3,4‐__e__]pyrazolo[3,4‐__b__]pyridine‐5(7__H__)‐one and indeno[2,1‐__e__]pyrazolo[3,4‐__b__]pyridine‐5(1__H__)‐one derivatives were synthesized via the three‐component reaction of an aldehyde, 5‐aminopyrazole and either tetronic acid or 1,3‐indanedione
## Abstract magnified image A series of furo[3,4‐__e__]pyrazolo[3,4‐__b__]pyridine analogues of podophylloxin were synthesized __via__ three‐component reactions of aldehydes, 3‐methyl‐1‐phenyl‐1__H__‐pyrazol‐5‐amine and tetronic acid in water under microwave irradiation without catalyst. This effi