Technical Notes:
1.Chiral Brønsted acid catalyst for enantioselective ionic 2+4 cycloadditions.
2.Direct Interconversion of BINOL and H8- BINOL -Based chiral Brønsted acids Using single -step Red/Oxmanipulations.
References:
1.Tetrahedron, 2013, 69, 5719.
2.Org. Lett., 2015, 17, 3774.