Compounds of formula (I) : formula (I) and salts, solvates, chemically protected forms, and prodrugs thereof, are disclosed wherein R2 is selected from: an optionally substituted napthyl group; an optionally substituted thiophenyl or furanyl group; and a phenyl group substituted by: one or more chloro or fluoro groups; an ethyl or propyl group; a 4-t-butyl group; a 2-methyl group; or two methyl groups in the 2- and 6- positions.
Application of the Stille coupling reaction to the synthesis of C2-substituted endo–exo unsaturated pyrrolo[2,1-c][1,4]benzodiazepines (PBDs)
作者:Arnaud C. Tiberghien、David Hagan、Philip W. Howard、David E. Thurston
DOI:10.1016/j.bmcl.2004.08.002
日期:2004.10
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