Oxidative fragmentation of catharanthine by dichlorodicyanoquinone
摘要:
Oxidation of catharanthine by DDQ leads to formation of products resulting from fragmentation of the C16-C21 bond as well as C3 and C5 dehydrogenation. Among the products are compounds containing a cyclopropane ring formed by bonding between C14 and C16. Cyclopropane ring formation can be also be observed from the intermediate generated by Potier-Polonovski fragmentation of catharanthine N-oxide.