Title

A novel achiral seco-amino-cyclopropylindoline (CI) analog of CC-1065 and the duocarmycins: design, synthesis and biological studies

ACS Citation

Toth, J. L.; Trzupek, J. D.; Flores, L. V.; Kiakos, K.; Hartley, J. A.; Pennington, W. T.; Lee, M. A novel achiral seco-amino-cyclopropylindoline (CI) analog of CC-1065 and the duocarmycins: design, synthesis and biological studies. Med. Chem. (Sharjah, United Arab Emirates) 2005, 1, 13-19.

Abstract

The design, synthesis and DNA binding properties of a novel achiral and amino-containing seco-cyclopropylindoline analog (seco-amino-CI-TMI, 1) of the duocarmycins are described. Thermal induced DNA cleavage studies on pUC18 DNA revealed compound 1 to preferentially bind in the minor groove and to covalently react with AT-rich sequences, particularly at the underlined adenine-N3 group of 5'-AAAAA(865)-3'. This sequence specificity is similar to adozelesin and CC-1065. Using a 4-day continuous exposure, compound 1 inhibited the growth of K562 human chronic myeloid leukemia cells in culture. Compound 1 has appreciable cytotoxicity (IC50 value of 1.30 microM) relative to compound 2 (0.15 microM), the corresponding racemic and hydroxy-seco-CI-TMI analog. These results indicate that the aminophenethyl chloride group present in compound 1 has similar sequence specific and cytotoxic properties to the hydroxy-containing seco-precursors of CC-1065 and the duocarmycins. Moreover, the results suggest that the chiral center present in the natural products is not absolutely necessary for biological activity. The novel aminophenethyl halide moiety is, therefore, a useful template from which to develop future achiral analogs of CC-1065 and the duocarmycins.

Source Name

Medicinal Chemistry (Sharjah, United Arab Emirates)

Publication Date

1-1-2005

Volume

1

Issue

1

Page(s)

523-530

Document Type

Citation

Citation Type

Article