Highly Regioselective Nitration Reactions Provide a Versatile Method of Functionalizing Benzocycloheptapyridine Tricyclic Ring Systems: Application toward Preparation of Nanomolar Inhibitors of Farnesyl Protein Transferase
作者:F. George Njoroge、Bancha Vibulbhan、Patrick Pinto、Tze-Ming Chan、Rebecca Osterman、Stacy Remiszewski、Jocelyn Del Rosario、Ronald Doll、V. Girijavallabhan、Ashit K. Ganguly
DOI:10.1021/jo971100z
日期:1998.2.1
of azatricyclic systems has been carried out. Whereas classical nitrations using KNO(3)-H(2)SO(4) at low temperatures gave nitrated products mainly at the 9-position, use of tetrabutylammonium nitrate-trifluoroacetic anhydride (TBAN-TFAA) resulted in exclusive nitration of the 3-position in the case carbamates 1, and 4-6 and the tricyclic ketone 7. These 3-nitro tricyclic derivatives have been valuable