An Efficient Synthesis of 1,2,9,9a-Tetrahydrocyclopropa[c]benz[e]indol-4-one CBI: An Enhanced and Simplified Analog of the CC-1065 and Duocarmycin Alkylation Subunits
摘要:
An efficient synthesis of 4, the immediate precursor to N-BOC-CBI and related analogs of CC-1065 incorporating the 1,2,9,9a-tetrahydrocyclopropa[c]benz[e]indol-4-one alkylation subunit, is described based on a Tempo trap of a 5-exo-trig aryl radical-alkene cyclization with direct introduction of a 3-(hydroxymethyl)indoline using an unfunctionalized alkene acceptor.
An Efficient Synthesis of 1,2,9,9a-Tetrahydrocyclopropa[c]benz[e]indol-4-one CBI: An Enhanced and Simplified Analog of the CC-1065 and Duocarmycin Alkylation Subunits
摘要:
An efficient synthesis of 4, the immediate precursor to N-BOC-CBI and related analogs of CC-1065 incorporating the 1,2,9,9a-tetrahydrocyclopropa[c]benz[e]indol-4-one alkylation subunit, is described based on a Tempo trap of a 5-exo-trig aryl radical-alkene cyclization with direct introduction of a 3-(hydroxymethyl)indoline using an unfunctionalized alkene acceptor.