Regioselective homo- and codimerization of 1-alkynes leading to 2,4-disubstituted 1-buten-3-ynes by catalysis of a (.ETA.5-C5Me5)2TiCl2/RMgX system.
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概要
- 論文の詳細を見る
A series of 1-alkynes (RC≡CH where R=Et, <I>n</I>-Pr, <I>n</I>-Bu, <I>n</I>-C<SUB>6</SUB>H<SUB>13</SUB>, cyclohexyl, Ph, Me<SUB>3</SUB>Si, Me<SUB>3</SUB>SiCH<SUB>2</SUB>, and Me<SUB>3</SUB>SiOCH<SUB>2</SUB>) was found to dimerize regioselectively (>99%) to 2,4-disubstituted 1-buten-3-ynes in 92–99% yields by catalysis of (η<SUP>5</SUP>-C<SUB>5</SUB>Me<SUB>5</SUB>)<SUB>2</SUB>TiCl<SUB>2</SUB>/<I>i</I>-PrMgBr at 30 °C in 1–3 h. The catalyst system is also effective for the regioselective codimerization of various 1-alkynes with 1-ethynylcyclohexene or ethynylbenzene.
- 公益社団法人 日本化学会の論文
著者
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Yasuda Hajime
Department Of Applied Chemistry Faculty Of Engineering Hiroshima University
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Nakamura Akira
Department Oc Macromolecular Science Faculty Of Science Osaka University
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NAKAMURA Akira
Department of Macromolecular Science, Faculty of Science, Osaka University
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Akita Munetaka
Department of Macromolecular Science, Faculty of Science, Osaka University
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