Unexpected carbon-oxygen bond cleavage of THF promoted by guanidinate titanium complex/lithium diisopropylamide: Synthesis and crystal structure 被引量：1

Unexpected carbon-oxygen bond cleavage of THF promoted by guanidinate titanium complex/lithium diisopropylamide: Synthesis and crystal structure

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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 [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. 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.

作者 ZHANG Yong WANG Mei YAO Yingming SHEN Qi

机构地区 Key Laboratory of Organic Synthesis Department of Public Course

出处《Chinese Science Bulletin》 SCIE EI CAS 2005年第24期2817-2820,共4页

基金 supported by the National Natural Science Foundation of China(Grant No.20472063).

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 titanium complex, guanidinate ligand, carbon-oxygen bond cleavage, crystal structure.

分类号 O626.11 [理学—有机化学]

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Chinese Science Bulletin

2005年第24期

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Unexpected carbon-oxygen bond cleavage of THF promoted by guanidinate titanium complex/lithium diisopropylamide: Synthesis and crystal structure 被引量：1

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