Synthesis and Antitumor Activities of 5-Methyl-1- and 2-[[2-Dimethylaminoethyl]amino]-aza-thiopyranoindazoles.
2010
The synthesis of 1- and 2-substituted aza-benzothiopyranoindazoles has been accomplished. The comparisons of the in vitro antitumor activities of the 2-substituted analogues with the benzothiopyranoindazole chemotypes indicate that the positioning of the nitrogen atom at C-9 (9-aza analogue 4d) leads to a substrate with potent antitumor activity. The 1-substituted aza-benzothiopyranoindazoles, in comparison with the corresponding 2-substituted analogues, exhibit a much lower potency.
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