HMPA-Free Generation of Trialkylsilyl Lithium Reagents and Its Application to Synthesis of Silylboronic Esters
Trialkylsilyl lithium species have turned out to be facilely generated by treating hexaalkyl disilanes with methyl lithium in the presence of tris(<i>N,N</i>-tetramethylene)phosphoric triamide (TPPA) as an activator, which can be trapped by boron electrophiles to afford silylboronic esters including long-awaited Me<sub>3</sub>Si–B(pin).
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2015 ◽
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