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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Formation and reactions of active five-membered phosphane/borane frustrated Lewis pair ring systems
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Formation and reactions of active five-membered phosphane/borane frustrated Lewis pair ring systems

机译:活性五元磷酸酯/硼烷的形成和反应令人沮丧的Lewis对环系统

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摘要

The reactive five-membered frustrated P/B Lewis pair 6a was generated from Tipp-P(vinyl)(2) (Tipp: 2,4,6-triisopropylphenyl) by a series of anti-Markovnikov and Markovnikov hydroboration reactions. The in situ generated compound dimerized to give 7a under kinetic control and the dimer pair 8a/9a under thermodynamic control. The Mes*-P(vinyl)(2) analogue (Mes*: 2,4,6-tri-tert-butylphenyl) reacts in a similar way, but in this case the thermodynamic dimers are observed at r.t. whereas the monomer 6b is the dominant species at 80 degrees C in solution. It is an active dihydrogen splitting reagent. The in situ generated monomeric five-membered P/B FLPs undergo addition reactions to various organic p-reagents. With benzaldehyde or phenylacetylene this gave the respective zwitterionic heteronorbornene or -norbornadiene type products, the latter with liberation of ethylene.
机译:通过Tipp-P(乙烯基)(2)(Tipp:2,4,6-三异丙基苯基)产生反应性五元挫折的P / B Lewis对6a,通过一系列抗马洛维尼科夫和马克诺维肽水合反应产生。 原位产生的化合物二聚化为在动力学控制下给药7a,在热力学控制下在动力学控制和二聚体对8a / 9a下。 MES * -P(乙烯基)(2)类似物(MES *:2,4,6-三叔丁基苯基)以类似的方式反应,但在这种情况下,在R.T的情况下观察热力学二聚体。 虽然单体6b是溶液中80℃的主导物种。 它是一种活性二氢分裂试剂。 原位生成的单体五元化P / B FLPS经历加法对各种有机P-试剂的反应。 用苯甲醛或苯乙烯,这给了相应的两性离子异共吸冰片烯或-BorbornadieNe型产品,后者乙烯释放。

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    Westfalische Wilhelms Univ Munster Inst Organ Chem Corrensstr 40 D-48149 Munster Germany;

    Westfalische Wilhelms Univ Munster Inst Organ Chem Corrensstr 40 D-48149 Munster Germany;

    Westfalische Wilhelms Univ Munster Inst Organ Chem Corrensstr 40 D-48149 Munster Germany;

    Westfalische Wilhelms Univ Munster Inst Organ Chem Corrensstr 40 D-48149 Munster Germany;

    Westfalische Wilhelms Univ Munster Inst Phys Chem Corrensstr 28-30 D-48149 Munster Germany;

    Westfalische Wilhelms Univ Munster Inst Phys Chem Corrensstr 28-30 D-48149 Munster Germany;

    Westfalische Wilhelms Univ Munster Inst Organ Chem Corrensstr 40 D-48149 Munster Germany;

    Westfalische Wilhelms Univ Munster Inst Organ Chem Corrensstr 40 D-48149 Munster Germany;

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  • 正文语种 eng
  • 中图分类 化学;无机化学;
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