Synthesis of Heteroarenes via Radical Cyclisation onto Nitriles
作者:W. Russell Bowman、Colin F. Bridge、Martin O. Cloonan、David C. Leach
DOI:10.1055/s-2001-14592
日期:——
A new protocol for the synthesis of tetracyclic nitrogen heteroarenes using cascade radical cyclisation has been developed. The key steps involve 5-exo vinyl radical cyclisation onto nitriles to yield intermediate iminyl radicals which cyclise onto an arene rings. Rings A-D of the anticancer alkaloids camptothecin, mappicine and nothapodytines A and B have been synthesised using this protocol.