HBTU-Catalyzed Simple and Mild Protocol for the Synthesis of Quinoxaline Derivatives

Sulfamic acid catalyzed facile synthesis of Arylmethyleneisoxazolone derivatives

“…Thus we find in the literature, as examples, the successful use of DOWEX® 50WX4/H2O [17], NaH2PO4 [18], boric acid [19], sodium benzoate [20], sodium acetate under visible light [21], Fe2O3, Clinoptilolite and H3PW12O40 under microwave irradiation [22] and imidazole under ultrasonic irradiation [23], tartaric acid [24], sodium tetraborate [25], sodium ascorbate [26], citric acid [27], sodium saccharin [28] and pyridinium p-toluenesulfonate [29]. Pyruvic acid [30], tomato fruit [31] and piperazine [32]. The same reaction without catalyst in aqueous medium was also successfully carried out [33].…”

[EMIM]AlCl4‐ionic liquid catalyzed mechanochemically assisted synthesis of 3,4‐dihydropyrimidin‐2‐(1H)‐one and thione derivatives

“…Since our research group is working in the field of synthesis of heterocyclic compounds utilizing the principles of green chemistry [35a–d]. Herein, we wish to report the mechanochemically assisted, [EMIM]AlCl 4 (Figure 2) catalyzed environmental benign methodology for the Biginelli reaction by incorporating the concept of mechanochemistry and the use of ionic liquid as a catalyst in ethanol.…”