| Unexpected carbon-oxygen bond cleavage of THF promoted by guanidinate titanium complex/lithium diisopropylamide： Synthesis and crystal structure |
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| 作者姓名： | ZHANG Yong WANG Mei YAO Yingming SHEN Qi |
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| 作者单位： | [1]Key Laboratory of Organic Synthesis, Department of Chemistry and Chemical Engineering, Suzhou University, Suzhou 215006, China [2]Department of Public Course, Bengbu Medical College,Bengbu 233003, China |
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| 基金项目： | Acknowledgements This work was supported by the National Natural Science Foundation of China （Grant No. 20472063）. |
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| 摘 要： | An unexpected carbon-oxygen bond cleavage of THF （THF = tetrahydrofuran） promoted by guanidinate titanium complex was described. Guanidinate lithium Pr2 ^1NC（NCy）2]Li （Cy = cyclohexyl） formed in situ reacted with TiCl4（THF）2 in a 2：1 molar ratio to produce the guanidinate titanium chloride Pr2 ^1NC（NCy）2]2TiCl2 （1） in good yield. The reaction of Pr2 ^1NC（NCy）2]2TiCl2 with lithium diisopropylamide in THF afforded an unexpected Pr2 ^1NC（NCy）2]2Ti（OBu^n）2 （2）, which was formed by the cleavage of carbon-oxygen bond of THF. Complexes 1 and 2 were fully characterized by elemental analysis, NMR and IR spectroscopies, and X-ray crystal structure determination for complex 2.
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| 关 键 词： | 四氢呋喃 钛络合物 胍配体 C-O键裂 合成 晶体结构 二异丙基酰胺 |
| 收稿时间： | 2005-04-01 |
| 修稿时间： | 2005-04-012005-06-21 |
Unexpected carbon-oxygen bond cleavage of THF promoted by guanidinate titanium complex/lithium diisopropylamide: Synthesis and crystal structure |
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| ZHANG Yong WANG Mei YAO Yingming SHEN Qi.Unexpected carbon-oxygen bond cleavage of THF promoted by guanidinate titanium complex/lithium diisopropylamide: Synthesis and crystal structure[J].Chinese Science Bulletin,2005,50(24):2817-2820. |
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| Authors: | Yong?Zhang Mei?Wang Email author" target="_blank">Yingming?YaoEmail author Qi?Shen |
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| Affiliation: | (1) Key Laboratory of Organic Synthesis, Department of Chemistry and Chemical Engineering, Suzhou University, 215006 Suzhou, China;(2) Department of Public Course, Bengbu Medical College, 233003 Bengbu, China |
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| Abstract: | An unexpected carbon-oxygen bond cleavage of THF (THF = tetrahydrofuran) promoted by guanidinate titanium complex was described. Guanidinate lithium Pr2iNC(NCy)2]Li (Cy = cyclohexyl) formed in situ reacted with TiCl4(THF)2 in a 2:1 molar ratio to produce the gua- nidinate titanium chloride Pr2iNC(NCy)2]2TiCl2 (1) in good yield. The reaction of Pr2iNC(NCy)2]2TiCl2 with lithium diisopropylamide in THF afforded an unexpected Pr2iNC(NCy)2]2Ti(OBun)2 (2), which was formed by the cleavage of carbon-oxygen bond of THF. Complexes 1 and 2 were fully characterized by elemental analysis, NMR and IR spectroscopies, and X-ray crystal structure determination for complex 2. |
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| Keywords: | titanium complex guanidinate ligand carbon-oxygen bond cleavage crystal structure |
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