Lj. Silverberg et al., A crystallization-induced stereoselective glycosidation reaction in the synthesis of the anticancer drug etoposide, ORG LETT, 2(21), 2000, pp. 3281-3283
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The anticancer drug etoposide, 1, is prepared in 79% overall yield from rea
dily available 4'-demethyl-4-epipodophyllotoxin, 3, and 4,6-O-ethylidene-2,
3-O-dibenzyl-D-glucose, 4, via a crystallization-induced stereoselective gl
ycosidation reaction followed by catalytic hydrogenation.