O'Brien, M., Weber, A., Hardy, G., & Ley, S. (2018). Highly diastereoselective boron and titanium mediated aldol reactions of a mannitol derived 2,3-butanediacetal ethyl ketone. Tetrahedron, 5319 - 5329. https://doi.org/10.1016/j.tet.2018.06.041