2,3-Epoxy-10-aza-10,11-dihydrosqualene, a high-energy intermediate analog inhibitor of 2,3-oxidosqualene cyclase
作者:Maurizio Ceruti、Gianni Balliano、Franca Viola、Giorgio Grosa、Flavio Rocco、Luigi Cattel
DOI:10.1021/jm00094a020
日期:1992.8
Wittig-Horner reaction which was modified for poorly reactive systems. This compound was designed to mimic the C-8 carbonium ion formed during SO cyclization. Its inhibitory activity on various SO cyclases was evaluated and compared with the 6 Z isomer which has an unfavorable geometry. Only isomer 6 E, the carbocation analogue, was active on SO cyclases from rat liver, pig liver, S. cerevisiae, and C. albicans
通过全合成获得了2,3-环氧-10-氮杂-10,11-二氢角鲨烯,一种高能的2,3-氧化角鲨烯(SO)环化酶中间体类似物抑制剂。这涉及到三个主要组成部分的制备:(1)C17类鲨烯类N-甲基胺,(2)3-(二苯基膦酰基)丙醛,和(3)5,6-环氧-6-甲基庚烷-2-一。6E双键重建的最后阶段是通过Wittig-Horner反应获得的,该反应针对反应性较差的系统进行了改进。设计该化合物以模拟在SO环化过程中形成的C-8碳鎓离子。评估了其对多种SO环化酶的抑制活性,并将其与几何形状不利的6 Z异构体进行了比较。只有异构体6 E(碳正离子类似物)对大鼠肝脏,猪肝,酿酒酵母和白色念珠菌微粒体的SO环化酶具有活性,I50从3到5 microM不等。在较高的测试浓度下,E和Z异构体均对角鲨烯环氧酶无活性。