2010 Fiscal Year Final Research Report
Development of High- and Low-valent Early Transition Metal Catalysts for Carbon-Carbon Bond Forming Reaction
| Project/Area Number |
21750101
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Synthetic chemistry
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| Research Institution | Osaka University |
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Principal Investigator |
TSURUGI Hayato Osaka University, 大学院・基礎工学研究科, 講師 (60432514)
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| Project Period (FY) |
2009 – 2010
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| Keywords | 炭素-水素結合活性化 / 前周期遷移金属錯体 / 低原子価錯体 / 酸化還元 / カップリング反応 |
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| Research Abstract |
We developed a novel oxidant-free cross dehydrogenative coupling reaction of 2,6-lutidine and internal alkynes leading to five-membered carbocyclic compounds by non-metallocene cationic hafnium alkyl complexes. We also found that mild and salt-free reduction of MCl_5 (M=Nb, Ta) was achieved by using 3,6-bis(trimethylsilyl)-1,4-hexadiene derivatives as reducing reagents. The salt contact free low-valent TaCl_3 exhibits high catalytic activity for the trimerization of ethylene to 1-hexene (>1000 TOF) with excellent selectivity (>98%).
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