Development of Bifunctional Chiral Thioureas and Thiosquaramides in the Synthesis of Betti Bases
作者:Martyna Malinowska、Anna Zawisza
DOI:10.3390/molecules28237835
日期:——
Bifunctional thioureas and, for the first time, bifunctional thiosquaramides as organocatalysts were used in the asymmetric Betti reaction involving 1-, 2-naphthols and hydroxyquinoline with N-tosylimine and ketimine. The described methodology affords direct access to chiral aminoarylnaphthols in excellent yield (up to 98%) with high enantioselectivity (up to 80% ee) and enantioenriched 3-amino-2-oxindoles