Abstract
As part of a search for new potent derivatives, electrochemical oxidation of etoposide (1) was carried out under controlled potential (500mV) to yield 1, 2-dehydroetoposide (4), 4'-O-demethyl-1, 2, 3, 4-tetradehydro-4-dehydroxy-podophyllotoxin (5) and 1, 2, 3, 4-tetradehydroetoposide (6). They showed no cytotoxicity against B16-melanoma.