Design, synthesis and anticancer activity of 2-amidomethoxy-1,4-naphthoquinones and its conjugates with Biotin/polyamine.

Bioorganic & Medicinal Chemistry Letters
Manoj ManickamSang-Hun Jung

Abstract

In continuation with the previous work, a series of 5-hydroxy-2-amidomethoxy-1,4-naphthoquinones were prepared to establish the structure-activity relationship studies toward anticancer activity (IC50 in µM) against three cell lines; colo205 (colon adenocarcinoma), T47D (breast ductal carcinoma) and K562 (chronic myelogenous leukemia). Among the synthesized compounds, naphthoquinone amines, 5 (0.8; 0.6; 0.8), 14 (0.8; 0.6; 0.5) and the amine precursor, 4 (1.3; 0.3; 1.0) displayed potent anticancer activities. A tumor targeting drug delivery system was achieved by synthesizing the conjugate 6 (1.4; 0.5; 1.1) of naphthoquinone-amine 5 and Biotin which also proved its potency. Finally, to introduce polyamine conjugate, spermidine was attached with 2-amidomethoxy-1,4-naphthoquinone. The naphthoquinone-spermidine conjugate 27 (1.2; 1.7; 1.7) also retained the activity. Thus, potent naphthoquinone amines were explored and Biotin/polyamine conjugate was developed as tumor targeting drug delivery system.

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