High-yielding macrocyclization conditions used in the synthesis of novel Sansalvamide A derivatives
作者:Thomas J. Styers、Rodrigo Rodriguez、Po-Shen Pan、Shelli R. McAlpine
DOI:10.1016/j.tetlet.2005.11.056
日期:2006.1
Described are the syntheses of nine Sansalvamide A derivatives using new, high-yielding, in situ deprotection–cyclization conditions that are general for this series of macrocycles, 55% average for both steps. This is 10-fold greater than previously reported yields.
Comprehensive Study of Sansalvamide A Derivatives and their Structure–Activity Relationships against Drug-Resistant Colon Cancer Cell Lines
作者:Katerina Otrubova、Gerald Lushington、David Vander Velde、Kathleen L. McGuire、Shelli R. McAlpine
DOI:10.1021/jm070731a
日期:2008.2.1
We report an extensive structure-activity relationship (SAR) of 62 compounds active against two drug-resistant colon cancer cell lines. Our comprehensive evaluation of two generations of compounds utilizes SAR, NMR, and molecular modeling to evaluate the key 3D features of potent compounds. Of the seven most potent compounds reported here, five are second-generation, emphasizing our ability to incorporate potent features found in the first generation and utilize their structures to design potency into the second generation. These analogs share no structural homology to current colon cancer drugs, are cytotoxic at levels on par with existing drugs treating other cancers, and demonstrate selectivity for drug-resistant colon cancer cell lines over noncancerous cell lines. Thus, we have established sansalvamide A as an excellent lead for treating, multiple drug-resistant colon cancers.