Oxygen-18 Scrambling Reaction of Aroyl Alkyl Carbonates
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概要
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Specifically <SUP>18</SUP>O-labeled <I>p</I>-substituted benzoyl cyclohexyl carbonates (<B>1</B>) were prepared and heated at 45, 70 and 75°C, and novel stepwise oxygen scrambling was found to take place in <B>1</B>. On being heated at 45°C, the carbonic carbonyl oxygen atom and the oxygen atom sandwiched between the two carbonyl carbon atoms of <B>1</B> were found to scramble. The <SUP>18</SUP>O-scrambling among the above two and carboxylic carbonyl oxygen atoms of <B>1</B> was found to take place at 70 or 75°C. A good first order kinetic dependence was observed for the first step of the scrambling at 45°C but no substituent effect. An intramolecular mechanism involving two steps of equilibration is proposed.
- 公益社団法人 日本化学会の論文
著者
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Fujimori Ken
Department Of Anatomy School Of Medicine Faculty Of Pharmaceutical Sciences Tokushima University
-
Oae Shigeru
Deparment of Applied Chemistry Faculty of Engineering Osaka City University
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Kozuka Seizi
Department of Applied Chemistry, Faculty of Engineering, Osaka City University
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Fujimori Ken
Department of Applied Chemistry, Faculty of Engineering, Osaka City University
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Uchida Yuzuru
Department of Applied Chemistry, Faculty of Engineering, Osaka City University
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