치환 티아졸의 양성자 친화도에 대한 Ab Initio 연구
Molecular electrostatic potential (MEP) of the thiazole, relevant to the binding of lexitroposin that contains thiazole ring to the base pair of minor groove of DNA is obtained from the results of ab initio calculation. The geometry optimization for the two possible conformations of protonated thiaz...
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Veröffentlicht in: | Journal of the Korean Chemical Society 1998, Vol.42 (1), p.1-8 |
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Sprache: | kor |
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Zusammenfassung: | Molecular electrostatic potential (MEP) of the thiazole, relevant to the binding of lexitroposin that contains thiazole ring to the base pair of minor groove of DNA is obtained from the results of ab initio calculation. The geometry optimization for the two possible conformations of protonated thiazoles is performed with the aid of MNDO and ab initio calculations. The proton affinities are calculated at the 6-31G and 6-31G basis set for the optimized geometry. The proton affinities are also studied for various substituted thiazoles with the electron-donating and electron-withdrawing groups to estimate substituent effect on the proton affinity of thiazoles. It is found that the thiazole with nitrogen atom aligned inward to the DNA minor groove exhibit higher proton affinity and electron-donating substituents increase the proton affinity of thiazoles.ĀȀꃏ�⨀缾ĀȀ會ĀȀ�⨀ꖓĀĀȀ會ĀȀ僐�⨀聥ꖓĀĀȀ會ĀȀ꣐�⨀聐缾ĀȀ會ĀȀÑ�⨀ၑ缾ĀȀ會ĀȀ壑�⨀ꁑ缾ᨀĀꀏ會Āꀏ냑�⨀⡒缾᐀Āꀏ會Āꀏ࣒�⨀끒缾ᰀĀꀏ會Āꀏ惒�⨀ꁩꖓȀĀꀏ會Āꀏ룒�⨀⡪ꖓሀĀꀏ會Āꀏდ�⨀ᤐ돀삺�⨀塨�⨀飣�⨀돐룣�⨀偠잖⨀샣�⨀줏덐탣�⨀젏ꠏܞȌ蠀ᥲͧMolecua及컲ࡔȏᰗۊऀںMolecular electrostatic potential (MEP) of the thiazole, relevant to the binding of lexitroposin that contains thiazole ring to the base pair of minor groove of DNA is obtained from the results of ab initio calculation. The geometry optimization for the two possible conformations of protonated thiazoles 티아졸 고리를 포함하는 lexitroposin에서, DNA minor groove의 염기쌍과 결합하는 부분인 티아졸의 분자정전기전위를 ab initio계산을 통해 구하였으며 protonate된 티아졸의 두 가지 가능한 형태에 대해 MNDO 및 ab initio방법으로 기하학적 구조를 최적화 하였다. 최적화된 구조에 대해 6-31G및 6-31G* basis set을 사용하여 양성자 친화도를 구하였으며 아울러 티아졸의 양성자 친화도에 미치는 치환기 효과를 알아보기 위해 전자를 주는 기와 전자를 끄는 기를 치환시킨 여러 치환 치아졸에 대해 양성자 친화도를 조사하였다. 그 결과 티아졸의 질소 원자가 DNA minor groove 쪽으로 배향되고 전자를 주는 기가 치환될 때 양성자 친화도가 증가됨을 알 수 있었다. |
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ISSN: | 1017-2548 2234-8530 |