Kalläne Sabrina I, Braun Thomas, Braun Beatrice, Mebs Stefan
Humboldt-Universität zu Berlin, Department of Chemistry, Brook-Taylor-Straße 2, D-12489 Berlin, Germany.
Dalton Trans. 2014 May 14;43(18):6786-801. doi: 10.1039/c4dt00080c.
The rhodium(I) boryl complex [Rh(Bpin)(PEt3)3] (1) reacts with the ketones α,α,α-trifluoroacetophenone and 9-fluorenone by insertion of the C=O bond to give [Rh{η(3)-C(CF3)(OBpin)C6H5}(PEt3)2] (4) and [Rh{η(5)-C13H8(OBpin)}(PEt3)2] (6), whereas the reaction with acetophenone leads to the formation of [Rh(H)(PEt3)3] (2), [Rh(OBpin)(PEt3)3] (3) and (E)-(Ph)CH=CHBpin. Treatment 1 of with ketimines generates [Rh{η(3)-C6H5=C(Ph)N(Ph)(Bpin)}(PEt3)2] (7), [Rh{(η(3)-C12H8)N(Ph)(Bpin)}(PEt3)2] (8) or [Rh{CPh2N(H)(Bpin)}(PEt3)2] (9). The insertion of aldimines into the Rh-B bond gives access to [Rhη(3)-CH{N(C6H13)Bpin}C6H52] (11) or [Rhη(3)-CH{N(Ph)Bpin}C6H52] (12). The latter is converted into the C-H activation product [Rh{(C6H4)-o-N(Bpin)(CH2Ph)}(PEt3)3] (13). Complex 13 reacts with B2pin2 to yield the boryl complex 1 and the amine PhCH2N(Bpin)(C6H4-o-Bpin).
铑(I)硼基配合物[Rh(Bpin)(PEt3)3](1)与酮α,α,α-三氟苯乙酮和芴酮通过C=O键插入反应,生成[Rh{η(3)-C(CF3)(OBpin)C6H5}(PEt3)2](4)和[Rh{η(5)-C13H8(OBpin)}(PEt3)2](6),而与苯乙酮的反应则导致生成[Rh(H)(PEt3)3](2)、[Rh(OBpin)(PEt3)3](3)和(E)-(Ph)CH=CHBpin。用酮亚胺处理1会生成[Rh{η(3)-C6H5=C(Ph)N(Ph)(Bpin)}(PEt3)2](7)、[Rh{(η(3)-C12H8)N(Ph)(Bpin)}(PEt3)2](8)或[Rh{CPh2N(H)(Bpin)}(PEt3)2](9)。醛亚胺插入Rh-B键可得到[Rh[η(3)-CH{N(C6H13)Bpin}C6H5](PEt3)2](11)或[Rh[η(3)-CH{N(Ph)Bpin}C6H5](PEt3)2](12)。后者转化为C-H活化产物[Rh{(C6H4)-o-N(Bpin)(CH2Ph)}(PEt3)3](13)。配合物13与B2pin2反应生成硼基配合物1和胺PhCH2N(Bpin)(C6H4-o-Bpin)。