Application of the Stille coupling reaction to the synthesis of C2-substituted endo-exo unsaturated pyrrolo[2,1-c][1,4]benzodiazepines (PBDs) |
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Authors: | Tiberghien Arnaud C Hagan David Howard Philip W Thurston David E |
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Affiliation: | Cancer Research UK Gene Targeted Drug Design Research Group, Department of Pharmaceutical and Biological Chemistry, The School of Pharmacy, 29-39 Brunswick Square, London WC1N 1AX, UK. |
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Abstract: | The Stille coupling reaction has been used to introduce novel vinyl, alkynyl and heterocyclic substituents to the C2-position of pyrrolo[2,1-c][1,4]benzodiazepine dilactams. Sodium borohydride reduction followed by N10-SEM deprotection has provided five analogues (6b, 8a-d) that contain C2-endo/exo-unsaturation and novel C2-substituents. These analogues have significant multilog cytotoxicity profiles in the NCI 60-Cell Line screen, and provide new SAR data for the PBD family. |
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