Stereoselective Aldol Reaction of Glutarimides Using Pseudo C2 Symmetry
摘要:
The boron aldol reaction of beta-substituted glutaric imides bearing an oxazolidinone-based auxiliary proceeds with excellent diastereoselectivity; switching the tertiary amine employed between i-Pr2EtN or Et3N affords enantiomeric lactone product.
As an extension of the boron enolate-based aldol reactions, the oxazolidinone-installed bisimide 1a from 3-(trifluoromethyl)glutaric acid was employed for Mannichreactions with tosylated imines 2 as electrophiles to successfully obtain the corresponding adducts in a stereoselective manner.
The boron aldol reaction of beta-substituted glutaric imides bearing an oxazolidinone-based auxiliary proceeds with excellent diastereoselectivity; switching the tertiary amine employed between i-Pr2EtN or Et3N affords enantiomeric lactone product.