title: Synthesis of diazahexathia-24-crown-8 derivatives and structures of Ag+ complexes.
abstract: Diazahexathia-24-crown-8 (2) has been isolated from the reaction mixture during the preparation of monoazatrithia-12-crown-4 (1). When N-Boc protected bis(2-chloroethyl)amine was employed as a starting material, N-Boc protected monoazatrithia-12-crown-4 (3) and N-Boc protected diazahexathia-24-crown-4 (4) were separated easily. Double-armed diazahexathia-24-crown-8 having two 3',5'-dichlorobenzyl groups (5a) or two 2-phenylethyl groups (5b) were also prepared using reductive amination. The stoichiometry and detailed structures of the Ag+ complexes with and were investigated by 1H NMR titration experiments and X-ray crystallography.
authors: Department of Chemistry, Faculty of Science, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan. habata@chem.sci.toho-u.ac.jp
authors: Yoichi
authors: Y
authors: Habata
authors: Joobeom
authors: J
authors: Seo
authors: Satoshi
authors: S
authors: Otawa
authors: Futoshi
authors: F
authors: Osaka
authors: Kanae
authors: K
authors: Noto
authors: Shim
authors: S
authors: Sung Lee