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 CO bond to give [Rhη3-C(CF3)(OBpin)C6H5}(PEt3)2] (4) and [Rhη5-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)CHCHBpin. Treatment of 1 with ketimines generates [Rhη3-C6H5C(Ph)N(Ph)(Bpin)}(PEt3)2] (7), [Rh(η3-C12H8)N(Ph)(Bpin)}(PEt3)2] (8) or [RhCPh2N(H)(Bpin)}(PEt3)2] (9). The insertion of aldimines into the Rh–B bond gives access to [Rh[η3-CHN(C6H13)Bpin}C6H5](PEt3)2] (11) or [Rh[η3-CHN(Ph)Bpin}C6H5](PEt3)2] (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)
硼烷基配合物[Rh(Bpin)(PEt3)3](1)通过插入 CO 键与酮α,α,α-三
氟苯乙酮和
9-芴酮反应生成[Rhη3-C(
CF3)(OBpin)
C6H5}(PEt3)2](4)和[Rhη5-
C13H8(OBpin)}(PEt3)2](6)、而与
苯乙酮反应则会生成[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 [Rhη3- C(Ph)N(Ph)(Bpin)}(PEt3)2] (7)、[Rh(η3-
C12H8)N(Ph)(Bpin)}(PEt3)2] (8) 或 [RhCPh2N(H)(Bpin)}(PEt3)2] (9)。将醛
亚胺插入 Rh-B 键后,可以得到[Rh[η3-CHN(
C6H13)Bpin} ](PEt3)2]。(11) 或 [Rh[η3-CHN(Ph)Bpin} ](PEt3)2]。(12).后者转化为 C-H 活化产物[Rh(
C6H4)-o-N(Bpin)(CH2Ph)}(PEt3)3](13)。络合物 13 与 B2pin2 反应生成
硼烷基络合物 1 和胺 PhCH2N(Bpin)( -o-Bpin)。