Thermodynamics of 3-hydroxy-7-bromo-5-(2’-chloro)phenyl-1,2-dihydro-3H-1,4-benzodiazepine-2-ones esters complexation with the central benzodiazepine receptors

• Дата: 2012
• Автори: Smulsky, S.P., Burenkova, N.O., Andronati, S.A., Pavlovsky, V.I., Polishchuk, P.G., Andronati, K.S.
• Формат: Стаття
• Мова: English
• Опубліковано: Інститут органічної хімії НАН України 2012
• Назва видання: Журнал органічної та фармацевтичної хімії
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/42067
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Thermodynamics of 3-hydroxy-7-bromo-5-(2’-chloro)phenyl-1,2-dihydro-3H-1,4-benzodiazepine-2-ones esters complexation with the central benzodiazepine receptors / S.P. Smulsky, N.O. Burenkova, S.A. Andronati, V.I. Pavlovsky, P.G. Polishchuk, K.S. Andronati // Журнал органічної та фармацевтичної хімії. — 2012. — Т. 10, вип. 4(40). — С. 65-70. — Бібліогр.: 34 назв. — англ.

The complexation of 3-alkylcarbonyloxy-7-bromo-5-(2'-chloro)phenyl-1,2-dihydro-3Н-1,4-benzodiazepine-2-ones (R=Мe (1), R=t-Bu (2)) with the central benzodiazepine receptors (CBDR) at six temperatures within the range of 0-35°С has been studied by the radioligand analysis method. It has been found that formation of the supramolecular complex of compound 1 with CBDR is endothermic with a rather great and unfavourable change of enthalpy (ΔН1° = +32,3 kJ/m%l), which is compensated by signifi cant change in entropy (ΔS1° = +266,7 J/(mol×К)). On the contrary, the binding of compound 2 to CBDR is exothermic (ΔН2° = -20,7 kJ/mol) and with a favourable entropy change (ΔS2° = +90,4 J/(mol×К)). The ester carbonyl groups in compounds 1 and 2 are also supposed to form different hydrogen bonds with the receptor.