Another example of this type is described in this communication in which the chlorine atom is present in the positions adjacent to the diphenyl linkage, The substance prepared was 2, 4, 6, 2', 4', 6 '-hexachloro-3, 3 '-di-carboxydiphenyl (IV). It was resolved through the brucine salt. The d-active compound was stable to racemization in boiling alcohol, glacial acetic acid and, as the sodium salt, in boiling water. The compound was synthesized by starting with ...
