지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
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Most stable conformers of some antiinflammatory fenamates were obtained by conformational free energy change calculations. Conformational energies for the molecules as unhydrate d state were estimated first, and those as hydrated state were calculated then to simulate the molecules in aqueous solution using a hydration shell model. The initial geometries of the molecules were obtained either from X-ray crystallographic data or from homologous molecular fragments. The bond lengths and angles were not varied, but all the torsion angles were varied step by step during the conformational free energy surface searching. The results show that there are several feasible conformations for a compound. And the molecules are somewhat stabilized by hydration (-${\delta}G_{hyd}{\cong}$13 to 16kcal/mole), but the conformations were not changed significantly by the hydration itself. There seems to be a strong tendency of intramolecular hydrogen bonding between imino hydrogen and carboxyl oxygen of the compounds. As a result, the carboxyl group cannot be rotated freely, and the rotation of the second aromatic ring is the main reason for the conformational variations of the compounds. The ECEPP force fields via the program CONBIO were used throughout this study.
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