Antineoplastic agents. 552. Oxidation of combretastatin A-1: trapping the o-quinone intermediate considered the metabolic product of the corresponding phosphate prodrug.

Antineoplastic agents. 552. Oxidation of combretastatin A-1: trapping the o-quinone intermediate considered the metabolic product of the corresponding phosphate prodrug.
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DOI:
10.1021/np800179g
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发表时间:
2008-09
影响因子:
5.1
通讯作者:
Hogan, Fiona
Hogan, Fiona
中科院分区:
生物学2区
文献类型:
--
作者:
Pettit, George R.;Thornhill, Andrew J.;Moser, Bryan R.;Hogan, Fiona

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The very unstable (< 10 min at rt) o-quinone (5) derived from the vicinal diphenol anticancer drug combretastatin A-1 (1) has been obtained by careful oxidation with NaIO4 and tetrabutylammonium bromide in water/dichloromethane. Immediate reaction with phenylenediamine (6) allowed o-quinone 5 to be trapped as the stable phenazine derivative (7). For further confirmation, 5 was also captured as a dimethoxyphenylenediamine-derived phenazine (11). Both phenazines 7 and 11 significantly inhibited (ED50 ~ 0.2 μg/mL) growth of the murine P388 lymphocytic leukemia cell line and provided a new SAR insight in the combretastatin series of naturally occurring anticancer drugs.
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