Starting from podophyllotoxin, five new derivatives with macrocyclic dilactone 5 similar to 9 have been synthesized,and their structures were confirmed by IR, MS,H-1 NMR as well as HRMS. The key step is cyclization by...Starting from podophyllotoxin, five new derivatives with macrocyclic dilactone 5 similar to 9 have been synthesized,and their structures were confirmed by IR, MS,H-1 NMR as well as HRMS. The key step is cyclization by high dilution method.展开更多
文摘Starting from podophyllotoxin, five new derivatives with macrocyclic dilactone 5 similar to 9 have been synthesized,and their structures were confirmed by IR, MS,H-1 NMR as well as HRMS. The key step is cyclization by high dilution method.
