2,3,4-tri-O-benzyl-6-deoxy-α,β-D-glucopyranosyl chloride 、
2,10-dibenzyloxy-12,13-dihydro-5H-indolo[2,3-a]pyrrolo[3,4-c]carbazole-6-methyl-5,7-(6H)-dione 在
氢氧化钾 、
sodium sulfate 作用下,
以
乙腈 为溶剂,
以99%的产率得到2,10-bis(benzyloxy)-6-methyl-12-((2R,3R,4S,5R,6R)-3,4,5-tris(benzyloxy)-6-methyltetrahydro-2H-pyran-2-yl)-12,13-dihydro-5H-indolo[2,3-a]pyrrolo[3,4-c]carbazole-5,7(6H)-dione