An efficient domino reaction in ionic liquid: Synthesis and biological evaluation of some pyrano- and thiopyrano-fused heterocycles
作者:Narsidas J. Parmar、Rikin A. Patel、Bhagyashri D. Parmar、Navin P. Talpada
DOI:10.1016/j.bmcl.2013.01.079
日期:2013.3
An improved domino/Knoevenagel-hetero-Diels–Alder reaction of two new aldehyde substrates; 7-olefinoxy-coumarin-8-carbaldehyde and 2-alkensulfanyl-quinoline-3-carbaldehyde, with pyrazolones was studied in ionic liquid triethylammonium acetate (TEAA), affording a series of pyrazolopyran annulated-pyrano-fused coumarins, and thiopyrano-fused quinolones. Besides acting as catalyst, since no additional
两种新型醛底物的改进的多米诺/ Knoevenagel-杂-Diels-Alder反应;在离子液体乙酸三乙铵(TEAA)中研究了7-烯烃氧基香豆素-8-甲醛和2-链烷硫基-喹啉-3-甲醛与吡唑啉酮的关系,提供了一系列吡唑并吡喃环吡喃并稠合的香豆素和噻喃并稠合的喹诺酮。 。除了充当催化剂外,由于不使用其他催化剂,离子液体TEAA还保证了其易于回收。在所有新的多杂环中,两个吡喃基环的顺式融合是根据2D NMR COZY和NOESY实验推论得出的。所有这些都是很好的抗结核药,因为它们对结核分枝杆菌H37Rv有活性和抗菌剂,因为它们对三种革兰氏阳性(肺炎链球菌,破伤风梭菌,枯草芽孢杆菌)和三种革兰氏阴性(鼠伤寒沙门氏菌,霍乱弧菌,大肠杆菌)具有活性。