Asymmetric synthesis with new chiral auxiliaries derived from isosorbide
摘要:
Chiral aminoethers derived from carbohydrates have been used for asymmetric alkylation of phenylacetic amides giving diastereoisomeric excess up to 83%.
A novel direct and diastereoselective amination of biosourced monobenzylated isohexides has been developed through borrowing hydrogen methodology using a cooperative catalysis between an iridium complex and a phosphoric acid. We also report herein the first regio- and diastereoselective direct amination of isosorbide.