Conjugates of betulin derivatives with AZT as potent anti-HIV agents
摘要:
Fourteen novel conjugates of 3,28-di-O-acylbetulins with AZT were prepared as anti-HIV agents, based on our previously reported potent anti-HIV triterpene leads, including 3-O-acyl and 3,28-di-O-acylbetulins. Nine of the conjugates (49-53, 55, 56, 59, and 60) exhibited potent anti-HIV activity at the submicromolar level, with EC(50) values ranging from 0.040 to 0.098 mu M in HIV-1(NL4-3) infected MT-4 cells. These compounds were equipotent or more potent than 3-O-(3',3'-dimethylsuccinyl) betulinic acid (2), which is currently in Phase IIb anti-AIDS clinical trial. (C) 2010 Elsevier Ltd. All rights reserved.
3-O-Glutaryl-dihydrobetulin and related monoacyl derivatives as potent anti-HIV agents
摘要:
3-O-Acyl-betulin and -dihydrobetulin derivatives were prepared and evaluated for anti-HIV activity. 3-O-Glutaryl-dihydrobetulin (17) demonstrated extremely potent anti-HIV activity with an EC50 value of 2 x 10(-5) muM and a TI value of 1.12 x 10(6). 3-O-(3',3'-Dimethylsuccinyl)- and 3-O-(3',3'-dimethylglutaryl)-dihydrobetulins (15, 16) were also potent anti-HIV compounds with EC50 values of 0.0017 and 0.0013 muM, respectively, and TI values of 16,160 and 19,530, respectively. (C) 2004 Elsevier Ltd. All rights reserved.
3-O-Glutaryl-dihydrobetulin and related monoacyl derivatives as potent anti-HIV agents
作者:Yoshiki Kashiwada、Michiko Sekiya、Yasumasa Ikeshiro、Toshihiro Fujioka、Nicole R. Kilgore、Carl T. Wild、Graham P. Allaway、Kuo-Hsiung Lee
DOI:10.1016/j.bmcl.2004.09.033
日期:2004.12
3-O-Acyl-betulin and -dihydrobetulin derivatives were prepared and evaluated for anti-HIV activity. 3-O-Glutaryl-dihydrobetulin (17) demonstrated extremely potent anti-HIV activity with an EC50 value of 2 x 10(-5) muM and a TI value of 1.12 x 10(6). 3-O-(3',3'-Dimethylsuccinyl)- and 3-O-(3',3'-dimethylglutaryl)-dihydrobetulins (15, 16) were also potent anti-HIV compounds with EC50 values of 0.0017 and 0.0013 muM, respectively, and TI values of 16,160 and 19,530, respectively. (C) 2004 Elsevier Ltd. All rights reserved.
Conjugates of betulin derivatives with AZT as potent anti-HIV agents
作者:Juan Xiong、Yoshiki Kashiwada、Chin-Ho Chen、Keduo Qian、Susan L. Morris-Natschke、Kuo-Hsiung Lee、Yoshihisa Takaishi
DOI:10.1016/j.bmc.2010.06.092
日期:2010.9
Fourteen novel conjugates of 3,28-di-O-acylbetulins with AZT were prepared as anti-HIV agents, based on our previously reported potent anti-HIV triterpene leads, including 3-O-acyl and 3,28-di-O-acylbetulins. Nine of the conjugates (49-53, 55, 56, 59, and 60) exhibited potent anti-HIV activity at the submicromolar level, with EC(50) values ranging from 0.040 to 0.098 mu M in HIV-1(NL4-3) infected MT-4 cells. These compounds were equipotent or more potent than 3-O-(3',3'-dimethylsuccinyl) betulinic acid (2), which is currently in Phase IIb anti-AIDS clinical trial. (C) 2010 Elsevier Ltd. All rights reserved.