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J Med Chem. 1993 Nov 26;36(24):3843-8.

Synthesis of 2,4-disubstituted thiazoles and selenazoles as potential antitumor and antifilarial agents: 1. Methyl 4-(isothiocyanatomethyl)thiazole-2-carbamates, -selenazole-2- carbamates, and related derivatives.

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Department of Medicinal Chemistry, College of Pharmacy, University of Michigan, Ann Arbor 48109-1065.


Methyl 4-(isothiocyanatomethyl)thiazole-2-carbamate and methyl 4-(isothiocyanatomethyl)selenazole-2-carbamate have been prepared via chemical transformations involving 2-amino-4-(chloromethyl)thiazole (1) and 2-amino-4-(chloromethyl)selenazole (2), respectively, as starting materials. The homoanalog, methyl 4-(2-isothiocyanatoethyl)thiazole-2-carbamate, was prepared from (2-aminothiazol-4-yl)acetic acid. All compounds prepared were evaluated for their ability to inhibit leukemia L1210 cell proliferation. Methyl 4-(isothiocyanatomethyl)thiazole-2-carbamate (7) was the most active compound in this screen, inhibiting the growth of L1210 leukemic cells with an IC50 = 3.2 microM. Mitotic blocking appears to be its primary mechanism of cytotoxic activity. Compound 7 also was the only compound which demonstrated significant in vivo antifilarial activity against the adult worms of Acanthocheilonema viteae in experimentally infected jirds. This compound was inactive against Brugia pahangi at a dosage of 100 mg/kg x 5 days.

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