Synthesis of DNA-Interactive Pyrrolo[2,1-<i>c</i>][1,4]benzodiazepines by Employing Polymer-Supported Reagents: Preparation of DC-81
作者:Ahmed Kamal、K. Reddy、V. Devaiah、N. Shankaraiah
DOI:10.1055/s-2004-834821
日期:——
generation of combinatorial library of substituted pyrrolo[2,1-c][1,4]benzodiazepine derivatives that provides a clean and efficient preparation and does not require conventional purification techniques like chromatography. This methodology involves intra molecular aza-Wittig reaction and has been extended for the synthesis of the naturalproduct DC-81 in good overall yields.
An efficient method for the reduction of aromatic azides in both solution and solid-phase has been developed by employing (BF3OEt2)-O-./EtSH. This report also describes resin cleavage employing this reagent system. Further, this protocol has been utilized for the solution as well as the solid-phase synthesis of pyrrolo[2, 1-c][1,4]benzodiazepines, including the naturally occurring antibiotic DC-81 and fused [2,1-b]quinazolinones. (c) 2006 Elsevier Ltd. All rights reserved.