[2-(4-Ethyl-4-hydroxy-3,13-dioxo-3,4,12,13-tetrahydro-1H-2-oxa-6,12a-diaza-dibenzo[b,h]fluoren-11-yl)-ethyl]-propyl-carbamic acid benzyl ester 在
palladium on activated charcoal
氢气 作用下,
以
溶剂黄146 为溶剂,
以53%的产率得到4-Ethyl-4-hydroxy-11-(2-propylamino-ethyl)-1,12-dihydro-4H-2-oxa-6,12a-diaza-dibenzo[b,h]fluorene-3,13-dione