L. Ling et al., A PRACTICAL ROUTE TO OPTICALLY-ACTIVE CBI, A POTENT ANALOG OF THE CC-1065 ALKYLATION SUBUNIT, Heterocyclic communications, 3(5), 1997, pp. 405-408
A 1,2,9,9a-tetrahydrocycloprop [c]benz[e]indol-4-one, CBI precursor, r
acemic 3 was resolved by Lipase PS catalyzed hydrolysis in water-satur
ated isopropyl ether. A practical route for the synthesis of optically
active CBI, a potent analog of the CC-1065 pharmacophore, starting fr
om the resolved material was thereby developed.