- S1 - Preparation of Tris(spiroorthocarbonate) Cyclophanes as Back to Back Ditopic Hosts Supporting Information Hiroshi Danjo,* ,† Kazuhisa Iwaso, ‡ Masatoshi Kawahata, § Kazuaki Ohara, § Toshifumi Miyazawa, † and Kentaro Yamaguchi § † Department of Chemistry and ‡ Graduate School of Natural Science, Konan University, 8-9-1 Okamoto, Higashinada, Kobe 658-8501, Japan § Faculty of Pharmaceutical Sciences at Kagawa Campus, Tokushima Bunri University, 1314-1 Shido, Sanuki, Kagawa 769-2193, Japan General. All manipulations were carried out under nitrogen atmosphere. NMR spectra were recorded on a Varian UNITY INOVA 500 (500 MHz for 1 H, and 126 MHz for 13 C). Chemical shifts were reported in δ ppm referenced to an internal tetramethylsilane standard for 1 H NMR. Residual chloroform (δ 77.0 for 13 C) was used as internal reference for 13 C NMR. 1 H, and 13 C NMR spectra were recorded in CDCl 3 at 25 °C. IR spectra were recorded on a JASCO FT/IR-4200. Optical rotations were recorded on a JASCO DIP-1000 polarimeter with a sodium lamp. Exact mass (HRMS) spectra were recorded on a Bruker FT-ICR apex-Qe. X-ray crystal structure data were collected using a Bruker SMART APEX II diffractometer with Mo-Kα radiation, or Bruker SMART APEX II Ultra diffractometer with Cu-Kα radiation. Materials. All reagents were obtained from commercial sources and used without further purification. Compound (R)-5a, (R)-5b, (S)-5a, and (S)-5b were prepared according to the literature procedure. 1)