Synthesis and Complement Inhibitory Activity of B/C/D-Ring Analogues of the Fungal Metabolite 6,7-Diformyl-3‘,4‘,4a‘,5‘,6‘,7‘,8‘,8a‘-octahydro-4,6‘,7‘-trihydroxy- 2‘,5‘,5‘,8a‘-tetramethylspiro[1‘(2‘<i>H</i>)-naphthalene-2(3<i>H</i>)-benzofuran]
作者:Barton J. Bradbury、Piotr Bartyzel、Teodoro S. Kaufman、Marcelo J. Nieto、Robert D. Sindelar、Susanne M. Scesney、Bruce R. Gaumond、Henry C. Marsh
DOI:10.1021/jm0204284
日期:2003.6.1
)-cyclohexane] partial analogues (5) of the complement inhibitory sesquiterpene fungal metabolite 6,7-diformyl-3',4',4a',5',6',7',8',8a'-octahydro-4,6',7'-trihydroxy-2',5',5',8a'- tetramethylspiro[1'(2'H)-naphthalene-2(3H)-benzofuran] (1a, K-76) and its silver oxide oxidized product (1b, K-76COOH). The described target compounds represent spirobenzofuran B/C/D-ring analogues lacking the A-ring component
本文报道了补体抑制倍半萜真菌代谢产物6,7-二甲酰基-3',4'的4-甲氧基和4-羟基螺[苯并呋喃-2(3H)-环己烷]部分类似物(5)的合成和生物测定。 ,4a',5',6',7',8',8a'-八氢-4,6',7'-三羟基-2',5',5',8a'-四甲基螺[1'(2' H)-萘-2(3H)-苯并呋喃](1a,K-76)及其氧化银氧化产物(1b,K-76COOH)。所述目标化合物代表缺少原型结构的A环成分的螺苯并呋喃B / C / D环类似物。通过抑制人血清中的总溶血补体活性来评估目标化合物。观察到结构简化的类似物4-甲氧基螺[苯并呋喃-2(3H)-环己烷] -6-羧酸(5a)的IC(50)= 0。53 mM类似于对天然产物衍生物1b观察到的IC(50)= 0.57 mM。发现IC(50)= 0.16 mM,三环部分结构6-羧基-7-甲酰基-4-甲氧基螺[苯并呋喃-2(3H)-环己烷]