Microwave assisted synthesis and solid-state characterization of lithocholyl amides of isomeric aminopyridines.
Microwave (MW) assisted synthesis and solid state structural characterizations of novel lithocholyl amides of 2-, 3-, and 4-aminopyridine are reported. It is shown that the MW technique is a proper method in the preparation of N-lithocholyl amides of isomeric aminopyridines. It offers many advantages compared to conventional heating. The molecular and crystal structures as well as the polymorphic and hydrated forms of prepared conjugates with their thermodynamic stabilities have been characterized by means of high resolution liquid- and solid-state NMR spectroscopy, single crystal and powder X-ray diffraction, and thermogravimetric analysis. Owing to the many biological functions of bile acids and amino substituted nitrogen heterocycles, knowledge of the crystal packing of these novel conjugates may have relevance for potential pharmaceutical applications.
University of Jyväskylä, Department of Chemistry, University of Jyväskylä, Finland. kari.v.ahonen@jyu.fi
Kari V
KV
Ahonen
Manu K
MK
Lahtinen
Arto M
AM
Valkonen
Martin
M
Dracínský
Erkki T
ET
Kolehmainen
D000577:Amides / Q000737:chemistry*; D000631:Aminopyridines / Q000138:chemical synthesis* / Q000737:chemistry; D003460:Crystallization; D007536:Isomerism; D008095:Lithocholic Acid / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008872:Microwaves; D013818:Thermogravimetry; D014961:X-Ray Diffraction
D000577:Amides; D000631:Aminopyridines; D008095:Lithocholic Acid