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Bioorganic & Medicinal Chemistry Letters | 2008

Synthesis of new benzimidazole linked pyrrolo[2,1-c][1,4]benzodiazepine conjugates with efficient DNA-binding affinity and potent cytotoxicity

Ahmed Kamal; P. Praveen Kumar; Kokkonda Sreekanth; B.N. Seshadri; P. Ramulu

The synthesis of new benzimidazole linked pyrrolobenzodiazepine conjugates is described. Some of these conjugates show significant DNA-binding affinity and, a representative compound 4c shows promising in vitro cytotoxicity against a number of human cancer cell lines.


Bioorganic & Medicinal Chemistry Letters | 2003

Design and synthesis of novel chrysene-linked pyrrolo[2,1-c] [1,4]-benzodiazepine hybrids as potential DNA-binding agents

Ahmed Kamal; G. Ramesh; P. Ramulu; O. Srinivas; Tasneem Rehana; Gurrala Sheelu

Chrysene-linked pyrrolobenzodiazepine hybrids have been prepared that possess cytotoxicity in some cancer cell lines. They also exhibit promising DNA-binding affinity and this is supported by molecular modeling studies.


Bioorganic & Medicinal Chemistry Letters | 2003

Synthesis of Novel C2 and C2-C8 Linked Pyrrolo(2,1-c)(1,4)benzodiazepine-naphthalimide Hybrids as DNA-Binding Agents

Ahmed Kamal; O. Srinivas; P. Ramulu; G. Ramesh; P. Praveen Kumar

Synthesis of C2 and C2-C8 linked pyrrolobenzodiazepine-naphthalimide hybrids have been prepared that exhibit significant DNA-binding affinity and cytotoxicity.


Bioorganic & Medicinal Chemistry Letters | 2003

Synthesis of C-8 methanesulphonate substituted pyrrolobenzodiazepines as potential antitumour agents

Ahmed Kamal; P. Ramulu; O. Srinivas; G. Ramesh

The facile synthesis of C-8 methanesulphonate substituted pyrrolobenzodiazepines is described. These have been prepared by linking the methanesulphonate at C-8 position with alkanol spacer and their in vitro cytotoxicity have been described.


Bioorganic & Medicinal Chemistry Letters | 2002

Synthesis of C-8 Alkylamino substituted pyrrolo[2,1-c][1,4]benzodiazepines as potential anti-Cancer agents

Ahmed Kamal; N. Laxman; G. Ramesh; O. Srinivas; P. Ramulu

The design and facile synthesis of C-8 alkylamino substituted pyrrolo[2,1-c][1,4]benzodiazepines is described. These have been prepared by linking the amines at C-8 position with propane spacer to improve solubility in water, and their in vitro cytotoxicity studies have been carried out.


Bioorganic & Medicinal Chemistry Letters | 2004

Synthesis of C8-linked pyrrolo[2,1-c][1,4]benzodiazepine-acridone/acridine hybrids as potential DNA-binding agents

Ahmed Kamal; O. Srinivas; P. Ramulu; G. Ramesh; P. Praveen Kumar


Bioorganic & Medicinal Chemistry Letters | 2003

Synthesis and DNA-binding affinity of A-C8/C-C2 alkoxyamido-linked pyrrolo[2,1-c][1,4]benzodiazepine dimers

Ahmed Kamal; P. Ramulu; O. Srinivas; G. Ramesh


Bioorganic & Medicinal Chemistry Letters | 2004

Synthesis and antitumour activity of pyrene-linked pyrrolo [2,1-c]benzodiazepine hybrids.

Ahmed Kamal; G. Ramesh; O. Srinivas; P. Ramulu


Bioorganic & Medicinal Chemistry Letters | 2004

Synthesis of C8-linked pyrrolo[2,1-c][1,4]benzodiazepine–benzimidazole conjugates with remarkable DNA-binding affinity

Ahmed Kamal; P. Ramulu; O. Srinivas; G. Ramesh; P. Praveen Kumar


Bioorganic & Medicinal Chemistry | 2004

Design, synthesis, and evaluation of mixed imine–amine pyrrolobenzodiazepine dimers with efficient DNA binding affinity and potent cytotoxicity

Ahmed Kamal; G. Ramesh; O. Srinivas; P. Ramulu; N. Laxman; Tasneem Rehana; M. Deepak; M.S. Achary; H.A. Nagarajaram

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