Selective C-2 and C-4 deacylation and acylation of taxol: The first synthesis of a C-4 substituted taxol analogue
作者:Gunda I. Georg、Syed M. Ali、Thomas C. Boge、Apurba Datta、Lise Falborg、Richard H. Himes
DOI:10.1016/0040-4039(94)88392-0
日期:1994.11
Hydrolytic procedures for selective 2-debenzoylation and 2,4-dideacylation of 2′-O-tert-butyldimethylsilyl-7-O-(triethylsilyl)taxol are reported. The firstsynthesis and biological evaluation of a 4-substituted analogue, 4-deacetyl-4-isobutanoyltaxol, is presented. The chemistry described in this letter is suitable for the facile synthesis of taxol congeners modified at C-2 and/or C-4.
Unexpectedly Facile Hydrolysis of the 2-Benzoate Group of Taxol and Syntheses of Analogs with Increased Activities
作者:Ashok G. Chaudhary、Milind M. Gharpure、John M. Rimoldi、Mahendra D. Chordia、David G. I. Kingston、Surinder Grover、Chii M. Lin、Ernest Hamel、A. A. Leslie Gunatilaka
DOI:10.1021/ja00088a063
日期:1994.5
Synthesis and Biological Evaluation of 2-Acyl Analogues of Paclitaxel (Taxol)
作者:David G. I. Kingston、Ashok G. Chaudhary、Mahendra D. Chordia、Milind Gharpure、A. A. Leslie Gunatilaka、Paul I. Higgs、John M. Rimoldi、Lakshman Samala、Prakash G. Jagtap、Paraskevi Giannakakou、Yuan Q. Jiang、Chii M. Lin、Ernest Hamel、Byron H. Long、Craig R. Fairchild、Kathy A. Johnston
DOI:10.1021/jm980229d
日期:1998.9.1
The anticancer drug paclitaxel (Taxol) has been converted to a large number of 2-debenzoyl-2-aroyl derivatives by three different methods. The bioactivities of the resulting analogues were determined in both tubulin polymerization and cytotoxicity assays, and several analogues with enhanced activity as compared with paclitaxel were discovered. Correlation of cytotoxicity in three cell lines with tubulin polymerization activity showed reasonable agreement. Among the cell lines examined, the closest correlation with antitubulin activity was observed with a human ovarian carcinoma cell line.