Studies on Azaindolizine Compounds. XVIII. Proton Magnetic Resonance Spectra of s-Triazolo-[1,5-α] pyrimidine and its Derivatives.
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概要
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Proton magnetic resonance spectra of the s-triazolo [1,5-α] pyrimidine derivatives are recorded to give the positional order of H_6>H_2>H_5>H_7 for the ring proton chemical shifts in τ-value. The methyl substituent effect on the proton chemical shifts and the correlation between the proton chemical shift and the local π-electron density on the carbon atom to which the proton is bonded, are discussed. Thus the charge densities determined from proton chemical shifts show a remarkably good correspondence with the charge distributions calculated by the simple Huckel MO method.
- 公益社団法人日本薬学会の論文
- 1964-02-25
著者
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通 和夫
Shionnogi Research Laboratory Shionogi and Co., Ltd.
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牧角 徳夫
Shionogi Research Laboratories Shionogi & Co. Ltd.
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渡辺 春幸
Shionogi Research Laboratory, Shionogi & Co., Ltd.
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渡辺 春幸
Shionogi Research Laboratory Shionogi & Co. Ltd.
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通 和夫
Shionogi Research Laboratory Shionogi & Co. Ltd.
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