作者:A. V. Pereslavtseva、I. A. Tolmacheva、P. A. Slepukhin、O. S. El’tsov、I. I. Kucherov、V. F. Eremin、V. V. Grishko
DOI:10.1007/s10600-014-0822-2
日期:2014.1
A-seco-triterpenoids with a methylketone group were synthesized from epimeric 3-hydroxy-3-methyl-1-cyano-2,3-seco-triterpenoids of the lupane and 19β,28-epoxy-18αH-oleanane types, which were formed by a Grignard reaction. The resulting methylketones underwent under base-catalysis conditions an intramolecular cyclization to form A-pentacyclic β-substituted alkenenitriles. The synthesized compounds included 3-methyl-1-cyano-19β,28-epoxy-2,3-seco-2-nor-18αH-olean-3-one and methyl 3-methyl-1-cyano-2-norlup-1(3),20(29)-dien-28-oate, which inhibited in vitro reproduction of human immunodeficiency virus type 1.
通过格氏反应,合成了具有甲基酮基的 A-共三萜类化合物,其原料为 3-羟基-3-甲基-1-氰基-2,3-共三萜类化合物(鲁帕烷和 19β,28-环氧-18αH-油烷类型)。在碱催化条件下,生成的甲基酮发生分子内环化反应,形成 A-五环 β 取代烯腈。合成的化合物包括 3-甲基-1-氰基-19β,28-环氧-2,3-seco-2-nor-18αH-olean-3-酮和 3-甲基-1-氰基-2-norlup-1(3),20(29)-dien-28-oate 甲酯,它们能抑制人类免疫缺陷病毒 1 型的体外繁殖。