Semisynthesis of ent-norstrobane diterpenoids as potential inhibitor for factor Xa
摘要:
A semisynthesis of two ent-strobane diterpenoids strobols C (7) and D (14) was accomplished via a Wagnar-Meerwein rearrangement. Compounds 7, 14, and the intermediate products were evaluated for their inhibition on factor Xa (FXa). Among all the compounds screened for FXa inhibitory activity, three compounds 6, 7, and 9 showed significant inhibitory activities with IC50 values of 1067 +/- 164, 81 +/- 11, 1023 +/- 89 nM, respectively. The inhibitory activity on FXa described in this study highlight the importance of structural modification based on natural products in the development of FXa inhibitors.
Cytotoxic Germacrane-Type Sesquiterpenes, Pimarane-Type Diterpenes, and a Naphthalene Derivative from Wollastonia biflora
摘要:
Phytochemical investigation of the whole plants of Wollastonia biflora led to the isolation and identification of three new germacrane-type sesquiterpenes (1-3), two new pimarane-type diterpenes (4-5), and a new naphthalene glycoside (6), along with 11 known compounds. Their structures were characterized on the basis of spectroscopic analyses and chemical methods. Compounds 1, 2, and 3 showed significant cytotoxic activity against the growth of hepatocellular carcinoma BEL-7402 cells in vitro.
New melampolides and darutigenol from Sigesbeckia orientalis
作者:R.N. Barua、Ram P. Sharma、Gopalakrishna Thyagarajan、Werner Herz、Serengolam V. Govindan
DOI:10.1016/s0031-9422(00)81985-8
日期:1980.1
Abstract Isolation and identification of darutigenol and two new melampolidesfrom Sigesbeckia orientalis , in addition to the previously described orientalide and darutoside, are reported.
Short, Divergent, and Enantioselective Total Synthesis of Bioactive <i>ent</i>-Pimaranes
作者:Immanuel Plangger、Klaus Wurst、Thomas Magauer
DOI:10.1021/acs.orglett.2c02843
日期:2022.10.7
We present the first total synthesis of eight ent-pimaranes via a short and enantioselective route (11–16 steps). Key features of the divergent synthesis are a Sharpless asymmetric dihydroxylation, a Brønsted acidcatalyzed cationic bicyclization, and a mild Rh-catalyzed arene hydrogenation for rapid access to a late synthetic branching point. From there on, selective functional group manipulations
我们首次通过一条短的对映选择性路线(11-16 步)全合成了八种ent -pimarane。发散合成的主要特征是 Sharpless 不对称二羟基化、Brønsted 酸催化的阳离子双环化和温和的 Rh 催化的芳烃氢化以快速获得后期合成支化点。从那时起,选择性的官能团操作能够合成在 A 环和 C 环中带有不同修饰的ent -pimaranes。
COSMETIC COMPOSITIONS COMPRISING ORIDONIN AND NEW COSMETIC USES
申请人:Fournial Arnaud
公开号:US20120028916A1
公开(公告)日:2012-02-02
The present invention related to cosmetic compositions comprising oridonin and new cosmetic uses. Oridonin is used for fighting the signs of cutaneous aging and for slimming. A composition comprising a combination of oridonin and darutigenol or a derivative thereof, in particular darutoside, is disclosed together with the cosmetic use of such composition.