Journal
BIOORGANIC & MEDICINAL CHEMISTRY LETTERS
Volume 16, Issue 21, Pages 5677-5681Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.bmcl.2006.08.005
Keywords
CC-1065; duocarmycins; pyrrolobenzodiazepines; achiral; seco-amino-CBI; dimer
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The design and synthesis of three novel bisalkylating agents derived from the achiral seco-duocarmycin or CC-1065 analogs and pyrrolobenzodiazepines (PBDs) are described: achiral seco-CBI (cyclopropanebenz[e]indoline)-PBD 11, achiral seco-CI-PBD 12, and achiral seco-CBI dimer 13. Compounds 11 and 12 demonstrated enhanced cytotoxicity over the monomer counterparts against the growth of PS 15 murine mastocytoma cells in culture. Conjugate 11 was found to covalently react with adenine-N3 positions within the minor groove at AT-rich sequences and to produce DNA interstrand crosslinks. Both compounds were found to induce apoptosis in P815 cells. Due to its poor water solubility, dimer 13 did not give any appreciable DNA binding or cytotoxicity. (c) 2006 Elsevier Ltd. All rights reserved.
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