From epoxides with DAST

Until now, no further work has been published on 13-fluoroanthraqrcline derivatives, except the synthesis of the 13-fluoroaglycone 51 that was obtained from the intermediate 8,9-epoxide 23 by reaction with DAST, followed by oxirane opening. Moreover, the 8,13-difluoro aglycone 53 could be prepared from 13-fluorinated analogue of compound 23 or from the 8-fluoro intermediate 26 by reaction with BF3 Et20 (Scheme 12) [36,41],... 

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