Preparation of Fused Tetracyclic Quinazolinones by Combinations of Aza-Wittig Methodologies and Cu<sup>I</sup>-Catalysed Heteroarylation Processes
作者:Juan Antonio Bleda、Pilar M. Fresneda、Raul Orenes、Pedro Molina
DOI:10.1002/ejoc.200900082
日期:2009.5
A number of linear quinazolinonesfused to five-membered rings – benzimidazo[2,1-b]quinazolinones 8 and benzothiazolo[2,3-b]quinazolinones 10 – have been prepared from iminophosphoranes 4, derived from N-substituted o-azidobenzamides by a combination of the aza-Wittigmethodology and Cu I -catalysed heteroarylation. The presence of a nitrogen functionality in the N-aryl substituent of 4 promotes heterocyclization