Abstract
Reaction of diethyl (isocyanomethyl)phosphonate with 2,5-dimethoxybenzaldehyde in tetrahydrofuran in the presence of butyllithium affords 2-(2,5-dimethoxyphenyl)ethenyl isocyanide with E-stereochemistry. Addition of hydrochloric acid at the isocyano carbon and hydrolysis of this adduct yields (E)-O,O-dimethylerbstatin
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