A five-step asymmetric synthesis of neopodophyllotoxin in 18% overall yield and optical purity > 97%, starting from 6-(3,4,5-trimethoxybenzyl)piperonal (6) and the fumarate of (S)-methyl mandelate (8), is described.
A five-step asymmetric synthesis of neopodophyllotoxin in 18% overall yield and optical purity > 97%, starting from 6-(3,4,5-trimethoxybenzyl)piperonal (6) and the fumarate of (S)-methyl mandelate (8), is described.