Selective preferential esterification of the dicarboxylic acids with longer carbon chain by diazomethane in the presence of dicarboxylic acids with shorter carbon chain by adsorbing and aligning the acids on alumina.
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概要
- 論文の詳細を見る
Selective monoesterification of a dicarboxylic acid with longer carbon chains by diazomethane in a mixture of dicarboxylic acids, [dodecanedioic acid (<B>C</B><SUB><B>12</B></SUB>) plus glutaric acid (<B>C</B><SUB><B>5</B></SUB>), adipic acid (<B>C</B><SUB><B>6</B></SUB>), pimelic acid (<B>C</B><SUB><B>7</B></SUB>), suberic acid (<B>C</B><SUB><B>8</B></SUB>), or sebacic acid (<B>C</B><SUB><B>10</B></SUB>)] was achieved by adsorbing and aligning the acids on alumina. The larger the difference in the number of carbon atoms, the higher the selectivity. In the case of the combination of <B>C</B><SUB><B>12</B></SUB> and <B>C</B><SUB><B>5</B></SUB> the highest selectivity was observed and the preferential 89% formation of the monomethyl ester of <B>C</B><SUB><B>12</B></SUB> was obtained in contrast to the 9% formation for the monomethyl ester of <B>C</B><SUB><B>5</B></SUB>. Selective reactions were also observed in the case of the combination of <B>C</B><SUB><B>10</B></SUB> and <B>C</B><SUB><B>4</B></SUB>, and that of <B>C</B><SUB><B>12</B></SUB> and <I>trans</I>-1,4-cyclohexanedicarboxylic acid.
- 公益社団法人 日本化学会の論文
著者
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Ogawa Haruo
Department Of Chemistry Faculty Of Education Tokyo Gakugei University
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Teratani Shousuke
Department Of Chemistry Faculty Of Education Tokyo Gakugei University
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Chihara Teiji
The Institute of Physical and Chemical Research
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Hiraga Nobuo
Department of Chemistry, Tokyo Gakugei University
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Taya Kazuo
Department of Chemistry, Tokyo Gakugei University
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