10.1021/ol070870m.s001 Katerina Kogan Katerina Kogan Silvio E. Biali Silvio E. Biali Intramolecular S<sub>N</sub>Ar Reactions in a Large-Ring Ketocalix[6]arene American Chemical Society 2007 MeI Ketocalix methylation conditions CrO 3 oxidation 2 e acetate groups Intramolecular SNAr Reactions intramolecular SNAr reactions methylene groups hydrolysis dixanthone calixarene derivatives 2007-06-07 00:00:00 Dataset https://acs.figshare.com/articles/dataset/Intramolecular_S_sub_N_sub_Ar_Reactions_in_a_Large_Ring_Ketocalix_6_arene/3003250 Ketocalix[6]arene <b>2e</b> was prepared by CrO<sub>3</sub> oxidation of the methylene groups of <b>2a</b>, followed by hydrolysis of the acetate groups. <b>2e</b> undergoes intramolecular S<sub>N</sub>Ar reactions under the usual methylation conditions (MeI, base), yielding mono- and dixanthone calixarene derivatives.