Isolation and structural characterisation of
[{(Me3Si)2NMg[µ-OC(H)Ph2]
·(O![[double bond, length as m-dash]](https://www.rsc.org/images/entities/char_e001.gif)
CPh2)}2], an intermediate in
the β-hydride transfer reaction between an alkyl(amido)magnesium and
benzophenone
Abstract
The in situ reaction of Bu
2
Mg with 2 mol. equiv. of
(Me
3
Si)
2
NH followed by addition of Ph
2
CO
yields the heteroleptic amide/alkoxide complex
[{(Me
3
Si)
2
NMg[µ-OC(H)Ph
2
]
·(OCPh
2
)}
2
] 1, whereas reaction
of purified [{(Me
3
Si)
2
N}
2
Mg] 2
with Ph
2
CO results in formation of the solvate
[{(Me
3
Si)
2
N}
2
Mg·(O
CPh
2
)
2
] 3, the difference being due to
incomplete amination of the bis(alkyl)magnesium compound resulting in
β-hydride transfer to the ketone, which is the first example of this
type of transformation using an alkyl(amido)magnesium reagent.
CPh
2
)}
2
] 1, whereas reaction
of purified [{(Me
3
Si)
2
N}
2
Mg] 2
with Ph
2
CO results in formation of the solvate
[{(Me
3
Si)
2
N}
2
Mg·(O
CPh
2
)
2
] 3, the difference being due to
incomplete amination of the bis(alkyl)magnesium compound resulting in
β-hydride transfer to the ketone, which is the first example of this
type of transformation using an alkyl(amido)magnesium reagent.
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![[double bond, length as m-dash]](https://www.rsc.org/images/entities/h2_char_e001.gif)
CPh2)}2], an intermediate in
the β-hydride transfer reaction between an alkyl(amido)magnesium and
benzophenone
