14-deoxy-11,12-didehydro-8,17-epoxyandrographolide 、
4,8-anhydro-1,3-dideoxy-D-glycero-L-gluco-nonulose 在
乙二胺 作用下,
以
甲醇 为溶剂,
以74%的产率得到3-((E)-2-((1S,2R,4aS,5R,6R,8aR)-6-hydroxy-5-(hydroxymethyl)-5,8a-dimethyloctahydro-1H-spiro[naphthalene-2,2'-oxiran]-1-yl)vinyl)-5-(1-((2S,3R,4R,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)propan-2-ylidene)furan-2(5H)-one