The invention is directed to novel acyloxy imidazole intermediates useful for making certain C-14 oxycarbonyl carbamate pleuromutilin derivatives. The invention is further directed to a process for making such acyloxy imidazole intermediates and to a process for making C-14 oxycarbonyl carbamate pleuromutilin derivatives using such acyloxy imidazole intermediates.
Process Development for A Novel Pleuromutilin-Derived Antibiotic
作者:Yemane Andemichael、Jun Chen、Jacalyn S. Clawson、Wenning Dai、Ann Diederich、Susan V. Downing、Alan J. Freyer、Peng Liu、Lynette M. Oh、Daniel B. Patience、Sonja Sharpe、Joseph Sisko、Julie Tsui、Frederick G. Vogt、Jun Wang、Lori Wernersbach、Edward C. Webb、James Wertman、Leon Zhou
DOI:10.1021/op900104g
日期:2009.7.17
A scalable synthesis of a novel pleuromutilin-based antibiotic is reported. The synthesis features the scale-up of an interesting skeletal rearrangement of the pleuromutilin core and isolation. of a highly purified product despite starting with relatively impure pleuromutilin. The use of Design of Experiment (DoE) and Principal Component Analysis (PCA) tools to achieve these goals is also discussed. Furthermore, the novel coupling of a carbamate and N-acyl-imidazole to produce the imidodicarbonate portion of the target molecule is described.