29-Methylidene-2,3-oxidosqualene Derivatives as Stereospecific Mechanism-Based Inhibitors of Liver and Yeast Oxidosqualene Cyclase
作者:Maurizio Ceruti、Flavio Rocco、Franca Viola、Gianni Balliano、Paola Milla、Silvia Arpicco、Luigi Cattel
DOI:10.1021/jm970534j
日期:1998.2.1
manner, as inhibitors of rat and yeast oxidosqualene cyclase. A new method for the synthesis of C22 squalene aldehyde 2,3-epoxide is reported, as well as that of other 19-modified 2,3-oxidosqualene analogues. We found that the activity is the opposite in the two series: the (E)-hexanormethylidene 21 and the (Z)-methylidene 31 are potent and irreversible inhibitors of oxidosqualene cyclase, while (Z
两对异构体(18Z)-(8),(18E)-29-亚甲基-2,3-氧化六降鲨烯(21)和(18Z)-(31),(18E)-29-亚甲基-2,3-氧化角鲨烯(34)已经以完全立体定向的方式获得,作为大鼠和酵母氧化角鲨烯环化酶的抑制剂。报道了一种新的合成C22角鲨烯醛2,3-环氧化物的新方法,以及其他19-修饰的2,3-氧化角鲨烯类似物的方法。我们发现,在两个系列中,活性是相反的:(E)-六降二烯21和(Z)-亚甲基31是强力和不可逆的氧化角鲨烯环化酶抑制剂,而(Z)-六降二烯8和(E)-亚甲基34个几乎完全不活动。减少18,19-双键(例如39)可消除活性,而除去两个19-连接基团(例如庚烷衍生物40)则大大降低了对酶的抑制作用。(E)-己二甲叉基21是该系列针对酵母酶的第一种不可逆抑制剂。