Isolation, Derivative Synthesis, and Structure–Activity Relationships of Antiparasitic Bromopyrrole Alkaloids from the Marine Sponge<i>Tedania brasiliensis</i>
作者:Lizbeth L. L. Parra、Ariane F. Bertonha、Ivan R. M. Severo、Anna C. C. Aguiar、Guilherme E. de Souza、Glaucius Oliva、Rafael V. C. Guido、Nathalia Grazzia、Tábata R. Costa、Danilo C. Miguel、Fernanda R. Gadelha、Antonio G. Ferreira、Eduardo Hajdu、Daniel Romo、Roberto G. S. Berlinck
DOI:10.1021/acs.jnatprod.7b00876
日期:2018.1.26
activity of pseudoceratidine (1) led us to synthesize 23 derivatives (16, 17, 20, 21, 23, 25, 27–29, 31, 33, 35, 38, 39, 42, 43, 46, 47, 50, and 51) with variations in the polyamine chain and aromatic moiety in sufficient amounts for biological evaluation in antiparasitic assays. The measured antimalarial activity of pseudoceratidine (1) and derivatives 4, 5, 16, 23, 25, 31, and 50 provided an initial SAR
从海绵Tedania brasiliensis中分离和鉴定了一系列新的假角鲨烷 ( 1 ) 衍生物,从而能够评估它们对恶性疟原虫、亚马逊利什曼原虫、婴儿利什曼原虫和克氏锥虫的抗寄生虫活性。分别是疟疾、皮肤利什曼病、内脏利什曼病和恰加斯病。报道了新的 3-去溴假角鲨烷 ( 4 )、20-去溴假角鲨烷( 5 )、4-溴假角鲨烷 ( 6 )、19-溴假角鲨烷 ( 7 ) 和 4,19-二溴假角鲨烷 ( 8 ) 。还描述了新的 tedamides A–D ( 9 – 12 ),其具有前所未有的 4-bromo-4-methoxy-5-oxo-4,5-dihydro-1 H -pyrrole-2-carboxamide 部分。化合物4和5、6和7、9和10以及11和12已被分离为不可分离的结构异构体对,其溴化或氧化位点不同。Tedamides 9 + 10和11 + 12作为光学活性对获得,表明酶促形成而不是人为起源。将假角鲨烷(