A novel reduced taxane, 13-acetyl-9(R)-dihydrobaccatin III (1) has been isolated from Taxus canadensis. The selective C-13 deacetylation of this isolate has allowed for the preparation of a wide variety of 9(R)-dihydrotaxane analogs. In general, this series has shown greater stability and water solubility than the 9-carbonyl series while retaining antimicrotubule and tumor cell cytotoxicity activities relative to taxol. Placement of polar functionalities at the C-7 position results in loss of activity whereas alkylation or acylation of either C-7 or C-9 hydroxyl groups ameliorate the activity.
Synthesis of 9-dihydrotaxol: A novel bioactive taxane
作者:Larry L. Klein
DOI:10.1016/s0040-4039(00)60342-8
日期:1993.3
The synthesis of 9-dihydrotaxol (8) is described via a novel deacylation reaction. This analog exhibits increased activity in the microtubule assay.
Antitumor Activity of 9(R)-Dihydrotaxane Analogs
作者:Larry L. Klein、Leping Li、Clarence J. Maring、Clinton M. Yeung、Sheela A. Thomas、David J. Grampovnik、Jacob J. Plattner
DOI:10.1021/jm00009a009
日期:1995.4
A novel reduced taxane, 13-acetyl-9(R)-dihydrobaccatin III (1) has been isolated from Taxus canadensis. The selective C-13 deacetylation of this isolate has allowed for the preparation of a wide variety of 9(R)-dihydrotaxane analogs. In general, this series has shown greater stability and water solubility than the 9-carbonyl series while retaining antimicrotubule and tumor cell cytotoxicity activities relative to taxol. Placement of polar functionalities at the C-7 position results in loss of activity whereas alkylation or acylation of either C-7 or C-9 hydroxyl groups ameliorate the activity.