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 quinazolinones fused 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-Wittig methodology and Cu I -catalysed heteroarylation. The presence of a nitrogen functionality in the N-aryl substituent of 4 promotes heterocyclization
许多与五元环稠合的线性喹唑啉酮 - 苯并咪唑 [2,1-b] 喹唑啉酮 8 和苯并噻唑并 [2,3-b] 喹唑啉酮 10 - 已从亚氨基膦 4 制备,该亚氨基正膦衍生自 N-取代的邻叠氮苯甲酰胺aza-Wittig 方法和 Cu I 催化的杂芳基化的组合。在氮杂-维蒂希反应/还原过程后,4 的 N-芳基取代基中氮官能团的存在促进了杂环化,或者穿过 2-位,得到喹唑啉[2,1-b]喹唑啉酮 11-14,或穿过4 位,以提供