作者:Paul A. Aristoff、Paul D. Johnson
DOI:10.1021/jo00049a035
日期:1992.11
A practical synthesis of CBI (2), utilizing inexpensive starting materials, was developed and applied to the synthesis of benzannelated analogs of CC-1065, in particular CBI-PDE-I-dimer (13) and CBI-bis-indole (17). While a Sharpless asymmetric dihydroxylation reaction proved effective at providing optically active intermediates, a more classical resolution procedure was used to prepare materials of higher optical purity. A novel cyclization employing a six-membered-ring intermediate (12) was employed to construct the cyclopropyl ring in CBI. Like CC-1065, CBI-PDE-I-dimer appears to cause delayed toxicity in mice.