| Budget Amount *help |
¥24,050,000 (Direct Cost: ¥18,500,000、Indirect Cost: ¥5,550,000)
Fiscal Year 2015: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2014: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2013: ¥13,780,000 (Direct Cost: ¥10,600,000、Indirect Cost: ¥3,180,000)
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| Outline of Final Research Achievements |
Monocarba-closo-dodecaborate (1; [closo-CB11H12]-, or C1-carborane anion) is a symmetrical and stable anionic cluster, which exhibits σ-aromaticity. In contrast to the rich applications of C2-carboranes (C2B10H12), the chemistry of C1-carborane anion as a platform of functional molecules were not well studied, due to the lack of its efficient functionalization. In particular, no efficient general methods are available for introduction of aryl groups at the carbon vertex of C1-carborane anion.
Thus, we have developed a general and efficient C-C cross-coupling reaction of 1. The use of copper(I) species as a transmetalating partner facilitated the cross-coupling process of the sterically-hindered C1-carborane anion. The potential applications of 1-C-arylated C1-carborane anion derivatives were also explored. Furthermore, conjugation between σ- and π－aromatic moieties in 1-C-arylated C1-carboran anion derivatives has been identified.
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