Comparison of Decamethyldizincocene [(η5-Cp*)2Zn2] versus Decamethylzincocene [Cp*2Zn] and Diethylzinc Et2Zn As Precatalysts for the Intermolecular Hydroamination Reaction

Comparison of Decamethyldizincocene [(η5-Cp*)2Zn2] versus Decamethylzincocene [Cp*2Zn] and Diethylzinc Et2Zn As Precatalysts for the Intermolecular Hydroamination Reaction
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十甲基二茂锌 [(β5-Cp*)2Zn2] 与十甲基二茂锌 [Cp*2Zn] 和二乙基锌 Et2Zn 作为分子间氢胺化反应预催化剂的比较

DOI:
10.1021/om300649q
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发表时间:
2012
期刊:
影响因子:
2.8
通讯作者:
P. W. Roesky
P. W. Roesky
中科院分区:
化学2区
文献类型:
--
作者:
A. Lühl;L. Hartenstein;S. Blechert;P. W. Roesky

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报道了在等摩尔量[PhNMe_2 H][B(C_6 F_5)_4]存在下,Zn-Zn键合物种[(η_5-Cp ~*)_2 Zn_2]与相关的有机金属锌化合物[Cp ~*_2 Zn]和ZnEt_2在分子间氢胺化反应中的比较.所有化合物在温和的条件下均表现出较高的反应速率,并对苯胺衍生物与伯炔的加成反应具有良好的官能团耐受性。其中茂金属[Cp* 2 Zn]的催化活性最高,而锌-锌键合的[(η5-Cp*)2 Zn 2]催化剂的选择性最好。最显著的是锌-锌键合的物质[(η5-Cp*)2 Zn 2]的出乎意料的优异催化性能。
A comparison of the Zn–Zn bonded species [(η5-Cp*)2Zn2] versus the related organometallic zinc compound [Cp*2Zn] and ZnEt2for the intermolecular hydroamination reaction in the presence of equimolar amounts of [PhNMe2H][B(C6F5)4] is reported. All compounds show high reaction rates under mild conditions and a good functional group tolerance for the addition of aniline derivatives to primary alkynes. Within this series the metallocene [Cp*2Zn] is the most active one, whereas the zinc–zinc bonded species [(η5-Cp*)2Zn2] shows the best selectivity. Most remarkable is the unexpected excellent catalytic performance of the zinc–zinc bonded species [(η5-Cp*)2Zn2].
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