75 ^1H T_1及びNOEによるTetrahydroprotoberberine型アルカロイドの立体配座解析
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概要
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Conformational analyses, using ^1H spin-lattice relaxation times (T_1) and nuclear Overhauser effects (NOE), were carried out for tetrahydroprotoberberine-type alkaloids (1)-(4). The calculated and observed values of T_1 and NOE were compared for several possible conformations and the optimum conformations are proposed. For alkaloid (3), the smallest R-factors for T_1 and NOE support the trans A conformation, whereas a little contribution of the cis B conformation is suggested for (1) and (2). The equilibrium of trans with ring C in the half-boat (A') and cis B is proposed to be the optimum conformation for (4). The correlation times for molecular rotational motion have been also evaluated.
- 天然有機化合物討論会の論文
- 1985-09-07
著者
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杉浦 眞喜子
神戸薬科大学
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岩佐 衣子
神戸薬科大学生薬化学研究室
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杉浦 眞喜子
神戸女子薬大
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岩佐 衣子
神戸女子薬大
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高尾 楢雄
神戸女子薬大
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岩佐 衣子
Kobe Women's College Of Pharmacy
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杉浦 眞喜子
Kobe Women's College Of Pharmacy
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