The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 2-Chloropyridine 1-oxide( cas:2402-95-1 ) is researched.HPLC of Formula: 2402-95-1.Ma, Yun-Sheng; Zha, Li-Qin; Cai, Wang-Shui; Tang, Xiao-Yan; Yuan, Rong-Xin published the article 《Two cobalt monophosphonates: Syntheses, structures and magnetic properties》 about this compound( cas:2402-95-1 ) in Inorganica Chimica Acta. Keywords: hydrothermal preparation crystal structure magnetic property cobalt hydroxypyridinephosphonate complex. Let’s learn more about this compound (cas:2402-95-1).
Hydrolysis of di-Et 6-chloro-2-pyridinephosphonate in HCl solution affords 6-hydroxy-2-pyridinephosphonic acid (H2hppa 1). In the structure, extensive hydrogen bonding interactions link the phosphonic acid mols. into a two-dimensional network. Reactions of H2hppa and cobalt acetate under hydrothermal conditions result in a new cobalt phosphonate Co(hppa)(H2O) (2). Compound 2 shows a layer structure, in which {Co2O2} dimers are connected through the corner-sharing of {CoO5N} octahedra and {PO3C} tetrahedra, forming an inorganic double-layer. Introduction of a second ligand (1,4-bis(imidazol-1-ylmethyl)benzene, L (8)) in the reaction system, compound [Co(hppa)(L)0.5(H2O)]·H2O (3) was obtained. In this structure, Co2+ ions are bridged by O-P-O bridges into an inorganic layer and the layers are pillared up by 1,4-bis(imidazol-1-ylmethyl)benzene. Magnetic study suggests that the existence of weak ferromagnetic coupling between Co2+ ions in the {Co2O2} unit for 2. For compound 3, O-P-O bridges mediate very weak antiferromagnetic interactions.
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Reference:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem