| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2011: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Research Abstract |
Previously, we achieved the Cu-catalyzed asymmetric conjugate addition (ACA) reaction by the use of a CH2-bridged hydroxy-amide-functionalized azolium salt. Now, we designed and synthesized a (CH2)2-bridged hydroxy-amide-functionalized azolium salt. In comparison with the product which was obtained in the ACA reaction by Cu(OTf)2 combined with CH2-bridged azolium salt, the combination of Cu(OTf)2 with (CH2)2-bridged ligand led to the formation of the 1,4-adduct with opposite configuration. In addition, dual enantioselective control in the ACA reaction with the same ligand precursor was observed by changing the Cu precatalyst from Cu(OTf)2 to Cu(acac)2. Furthermore, a new ester-amide-functionalized azolium salt was also developed. It was found that the absolute configuration of the conjugate adduct in the ACA reaction using the ester-amide-functionalized azolium salt differs from that obtained in the ACA reaction using the hydroxy-amide-functionalized azolium salt.
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