Stannyl-Alkali Metal Reagents

Stannyl-alkali metal reagents and haioaminoboranes yield Sn—boron bonds, but the method does not include haloborazines as starting materials (Table 1). 

Cleavage of the boron—Co bond by tin halides yields Sn—boron bonds . The route supplements those involving stannyl-alkali-metal reagents and haloaminoboranes ( 5.3.17.2.2). 

S.4.6.7. from Stannyl-Alkali-Metal Reagents with Organomagneslum-Hallde Reagents... 

Germyl, Stannyl, and Plumbyl Anions The preparative methods for the synthesis of the germyl, stannyl, and plumbyl anions are essentially the same as those mentioned above for the silyl anions. The most widely used methods are (1) reduction of halides R3EX (R = alkyl, aryl E = Ge, Sn, Pb X = Cl, Br) with alkali metals and (2) reductive cleavage of the E-E bond of R3E-ER3 (R = alkyl, aryl E = Ge, Sn, Pb) with alkali metals or organolithium reagents. Due to the favorable polarization of the (E = Ge, Sn, Pb) bond, the direct metalation... 

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