A Novel, Unusually Efficacious Duocarmycin Carbamate Prodrug That Releases No Residual Byproduct

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• 作者：Amanda L. Wolfe ; Katharine K. Duncan ; Nikhil K. Parelkar ; Scott J. Weir ; George A. Vielhauer ; Dale L. Boger
• 刊名：Journal of Medicinal Chemistry
• 出版年：2012
• 出版时间：June 28, 2012
• 年：2012
• 卷：55
• 期：12
• 页码：5878-5886
• 全文大小：365K
• 年卷期：v.55,no.12(June 28, 2012)
• ISSN：1520-4804

文摘

A unique heterocyclic carbamate prodrug of seco-CBI-indole₂ that releases no residual byproduct is reported as a new member of a class of hydrolyzable prodrugs of the duocarmycin and CC-1065 family of natural products. The prodrug was designed to be activated by hydrolysis of a carbamate releasing the free drug without the cleavage release of a traceable extraneous group. Unlike prior carbamate prodrugs examined that are rapidly cleaved in vivo, the cyclic carbamate was found to be exceptionally stable to hydrolysis under both chemical and biological conditions providing a slow, sustained release of the exceptionally potent free drug. An in vivo evaluation of the prodrug found that its efficacy exceeded that of the parent drug, that its therapeutic window of efficacy versus toxicity is much larger than the parent drug, and that its slow free drug release permitted the safe and efficacious use of doses 150-fold higher than the parent compound.