کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2486226 | 1114378 | 2010 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Physical and crystallographic characterisation of the mGlu5 antagonist MTEP and its monohydrochloride
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کلمات کلیدی
موضوعات مرتبط
علوم پزشکی و سلامت
داروسازی، سم شناسی و علوم دارویی
اکتشاف دارویی
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چکیده انگلیسی
An improved medium scale synthesis of 3-[(2-methyl-1,3-thiazol-4-yl)ethynyl]pyridine (MTEP), a selective and potent metabotropic glutamate subtype 5 (mGlu5) antagonist, has allowed thorough characterisation of the crystal structures of the free base and the previously unreported hydrochloride (MTEP.HCl). Hirshfeld surface analysis has revealed that molecules in crystalline MTEP are weakly polar, and aggregate through nonclassical C-Hâ¯N hydrogen bonds. A strong ionic N-H+â¯Clâ hydrogen bond dominates the crystal packing in MTEP.HCl. Despite significant differences in the crystal packing, the molecular structures of MTEP and MTEP.HCl are very similar. The acid dissociation constants for MTEP were investigated using 1H NMR spectroscopy. The second acid dissociation constant (pKa2), associated with the pyridine nitrogen, was determined to be 3.40±0.01, whilst pKa1, associated with the thiazole nitrogen, was estimated to be 0.2. The low pKa values make it unlikely that MTEP is protonated in its biologically active form. © 2009 Wiley-Liss, Inc. and the American Pharmacists Association J Pharm Sci 99:234-245, 2010
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Pharmaceutical Sciences - Volume 99, Issue 1, January 2010, Pages 234-245
Journal: Journal of Pharmaceutical Sciences - Volume 99, Issue 1, January 2010, Pages 234-245
نویسندگان
Matthew J. McIldowie, Michael N. Gandy, Brian W. Skelton, Jonathan M. Brotchie, George A. Koutsantonis, Mark A. Spackman, Matthew J. Piggott,