From tin hydrides

For an analysis of the relative reactivity of vinyl and aryl radicals towards cyclization and hydrogen abstraction from tin hydride, see ref. 34, p. 429. 

Neutral aminyl radicals generated from tin hydride-mediated reactions of sulfenamides (Section II,F) have been shown to undergo cyclizations when energetically favored by addition to a strained alkene or by formation of a stabilized intermediate benzylic radical. In both cases, the reverse reaction, cleavage of the /3-amino radical, apparently did not occur (92TL4993). 

Stannyl Grignard reagents are more easily available from tin hydrides (equation 68)86,87. 

Chatgilialoglu, C., Ferrari, C. Progress of the Barton-Mccombie methodology from tin hydrides to silanes. Res. Chem. Intermed. 1993,19,... 

Benzeneselenol can be used as a polarity-reversal catalyst for abstraction of hydrogen from tin hydrides by carbon-centered radicals (Scheme 15.56) [134]. 

Halogen abstraction from 2-substituted 1-chloro-l-fluorocyclopropanes gives two dia-stereomeric radicals, which subsequently abstract hydrogen from tin hydrides. Again, retention of configuration is observed when the trapping reaction is fast6. 

Figure 3 shows the simple case of a clock reaction competing with hydrogen atom transfer from tin hydride. If one wished to determine, for example, the rate of addition of a primary alkyl radical to an activated alkene such as an acrylate, then the reaction could be run at low concentrations of tin hydride such that both the radical clock and its rearrangement product reacted predominantly with the alkene. The products of the acrylate addition reaction are deactivated with respect to addition to another acrylate molecule, and one could control concentrations such that these adducts reacted primarily with the tin hydride (Scheme 3). In this case, then, one would analyze for the acrylate addition products of the unrearranged and rearranged radicals.

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