Becker, G., & Wurm, F. R. (2017). Breathing air as oxidant: Optimization of 2-chloro-2-oxo-1,3,2-dioxaphospholane synthesis as a precursor for phosphoryl choline derivatives and cyclic phosphate monomers. Tetrahedron, 73(25), 3536-3540. doi:10.1016/j.tet.2017.05.037.