A Route to Regioselectively Functionalized Carbazoles, Dibenzofurans, and Dibenzothiophenes through Anionic Cyclization of Benzyne-Tethered Aryllithiums
作者:Roberto Sanz、Yolanda Fernández、M Pilar Castroviejo、Antonio Pérez、Francisco J. Fañanás
DOI:10.1021/jo060911c
日期:2006.8.1
available products, with 3.3 equiv of t-BuLi and further reaction with selected electrophiles gives rise to functionalized carbazole, dibenzofuran, and dibenzothiophene derivatives in a direct and regioselective manner. The process involves an anionic cyclization on a benzyne-tethered aryllithium intermediate.
用3.3当量的t- BuLi处理易于从市售产品中制备的2-氟苯基2-碘苯胺,醚和硫醚,然后与选定的亲电试剂进一步反应,可以直接和直接生成官能化的咔唑,二苯并呋喃和二苯并噻吩衍生物。区域选择性方式。该方法涉及在苯炔系留的芳基锂中间体上进行阴离子环化。