作者:Adam T. Gillmore、Matthew Badland、Clare L. Crook、Nieves M. Castro、Douglas J. Critcher、Steven J. Fussell、Katherine J. Jones、Matthew C. Jones、Eleftherios Kougoulos、Jinu S. Mathew、Lynne McMillan、John E. Pearce、Fiona L. Rawlinson、Alexandra E. Sherlock、Robert Walton
DOI:10.1021/op200238p
日期:2012.12.21
Novel PARP inhibitor 1 is a promising new candidate for treatment of breast and ovarian cancer. A modified synthetic route to 1 has been developed and demonstrated on 7 kg scale. In order to scale up the synthesis to multikilogram scale, several synthetic challenges needed to be overcome. The key issues included significant thermal hazards present in a Leimgruber-Batcho indole synthesis, a low-yielding side-chain installation, a nonrobust Suzuki coupling and hydrogen cyanide generation during a reductive amination. In addition to these issues, changing from intravenous to oral delivery required a new salt form and therefore a new crystallization procedure. This contribution describes development work to solve these issues and scaling up of the new process in the pilot plant.