Synthesis of terminal acetylenes using POCl3 in pyridine as applied to natural triterpenoids
摘要:
Four new triterpenoids with alkyne moieties have been synthesized by the proposed procedure; among them, 3 beta,28-dihydroxy-29-norlup-20(30)-yne has demonstrated antiviral activity against papilloma virus and HCV replicon.
Betulin and ursolic acid synthetic derivatives as inhibitors of Papilloma virus
作者:Oxana B. Kazakova、Gul’nara V. Giniyatullina、Emil Yu. Yamansarov、Genrikh A. Tolstikov
DOI:10.1016/j.bmcl.2010.05.083
日期:2010.7
conversion of betulin to the new ursane-type triterpenoid by treatment of allobetulin with Ac2O–HClO4 is suggested. Cyanoethylation of ursonic acid oxime led to cyanoethyloximinoderivative. According to the results of antiviral screening against human papillomavirus type 11 the selectivity index for tested triterpenoids has a range from 10 to 35 with no cellular cytotoxicite, the most remarkable activity
报道了新的甜菜碱和熊果酸衍生物的合成及其体外抗病毒活性的评价。在位置C-3,C-20和C-28上修饰桦蛋白,得到具有烟酰基,甲氧基肉桂酰基,炔和氨基丙氧基-2-氰基乙基部分的衍生物。建议通过用Ac 2 O–HClO 4处理别壁蛋白将桦木素分两阶段转化为新的乌烷型三萜。熊果酸肟的氰乙基化反应导致了氰基乙基肟亚衍生物。根据针对11型人乳头瘤病毒的抗病毒筛选结果,测试的三萜类化合物的选择性指数范围为10至35,无细胞毒物,发现3β,28-di- O的活性最显着-烟酰胺基白蛋白。3β,28-二羟基-29-norlup-20(30)-yne对HCV复制子也有活性(EC 50 1.32; EC 90 16.82; IC 50 12.41; IC 90 > 20; SI 50 9.4; SI 90 > 1.19)。28- ø -Methoxycynnamoylbetulin兑A型流感病毒(H1N1)活性(ЕС
Effective synthesis and transformations of Alkyne betulin derivatives
作者:O. B. Kazakova、E. Yu. Yamansarov、L. V. Spirikhin、M. S. Yunusov、I. P. Baikova、O. S. Kukovinets、R. Z. Musin
DOI:10.1134/s1070428011030249
日期:2011.3
An effective procedure for the synthesis of terminal acetylene derivatives via reaction of methyl ketones with phosphoryl chloride in pyridine was proposed using triterpene betulin as an example. Bis-acetylenic triterpenoid was obtained by oxidative self-coupling of 29-norlup-20(30)-yne-3 beta,28-diyl diacetate.
Synthesis of terminal acetylenes using POCl3 in pyridine as applied to natural triterpenoids
作者:Oxana B. Kazakova、Natalya I. Medvedeva、Genrikh A. Tolstikov、Olga S. Kukovinets、Emil Y. Yamansarov、Leonid V. Spirikhin、Aidar T. Gubaidullin
DOI:10.1016/j.mencom.2010.06.018
日期:2010.7
Four new triterpenoids with alkyne moieties have been synthesized by the proposed procedure; among them, 3 beta,28-dihydroxy-29-norlup-20(30)-yne has demonstrated antiviral activity against papilloma virus and HCV replicon.
The Synthesis and Selective Cytotoxicity of New Mannich Bases, Derivatives of 19- and 28-Alkynyltriterpenoids
作者:E. F. Khusnutdinova、G. N. Apryshko、A. V. Petrova、O. S. Kukovinets、O. B. Kazakova
DOI:10.1134/s1068162018010090
日期:2018.1
New propargylamines were synthesized in 72–75% yields by the interaction of 19-alkynylbetulin and 28-O-propargyl glycinamide of oleanolic acid with N-methylpiperazine under the Mannich reaction conditions. 19-[1-Methyl-4-prop-2-yn-1-yl-piperazine]-20,29,30-trinorbetulin was shown to manifest anticancer activity against one line of leukemia cells and two lines of colon cancer cells, whereas the growth