Noscapine, a natural alkaloid, has never been used as a parent scaffold in chiral
induction. The first examples of noscapinoid compounds as efficient catalysts in asymmetric
synthesis are now reported. Three derivatives of noscapine were synthesized from its
reaction with different Grignard reagents. Asymmetric addition of diethylzinc to aldehydes
was performed in the presence of these catalysts in high yields and good to excellent
ees.
Key words
noscapine - asymmetric reaction - diethylzinc - alkaloids - MacroModel