Beyond Passive Substituents: Tosyl-Directed Self-Templation Enables Selective Pillar[4 + 1]arene Formation and Topology Switching - Araya Ruengsuk; Korawit Khamphaijun; Pipatpong Laoviwat; Nuntaporn Kamonsutthipaijit; Jonggol Tuntirungrotechai; Yasuteru Shigeta; Kowit Hengphasatporn; David J. Harding; Thanthapatra Bunchuay (Journal of the American Chemical Society, 2026)