Asymmetric hetero Diels-Alder reaction catalyzed by stable and easily prepared chiral (acyloxy)borane (CAB) catalysts
摘要:
A stable chiral (acyloxy)borane (CAB) complex is prepared in situ by mixing tartaric acid derivative and arylboric acid at room temperature. A solution of the catalyst is effective to catalyze hetero Diels-Alder reaction to produce dihydropyrone derivatives of high optical purities.