Synthesis of some indole based spiro and condensed heterocycles as potential biologically active agents
作者:R. L. Sharma、Daljeet Kour、Jasbir Singh、Surinder Kumar、Poonam Gupta、Shallu Gupta、Bhavneet Kour、Anand Sachar
DOI:10.1002/jhet.5570450634
日期:2008.11
as racemates. Cyclocondensation of (3a) and (3b) with thiourea, urea, ethylenediamine and o-phenylenediamine afforded new spiro (4a,b-7a,b) and condensed systems (4a',b'-7a',b') respectively, whereas with 2-aminopyridine spiro compounds exclusively were obtained (8a,8b). All the new spiro and condensed systems generated have been isolated as racemates and evaluated for their antimicrobial activity.
isatin与环状酮的反应,即樟脑(dl,Mp 174–181°C,比旋度-1.5°至+ 1.5°),可从sd fine-CHEM LTD和薄荷酮(I,Bp 207°–210°C,从薄荷油中分离得到的密度为0.893 g / mL),在t-BuOK存在下在回流的乙醇中提供相应的吲哚基化合物(3a)和(3b)(在两种情况下分别为立体化学异构体E和Z的混合物),所有获得为消旋体。将(3a)和(3b)与硫脲,尿素,乙二胺和邻苯二胺进行环缩合,得到新的螺环(4a,b-7a,b)和缩合体系(分别为4a',b'-7a',b'),而仅使用2-氨基吡啶螺环化合物得到(8a,8b)。所产生的所有新螺环和缩合系统均已被分离为外消旋体,并对其抗菌活性进行了评估。