α-Elimination from 1 and thermal or photochemical cleavages of 2 produce tBu2Si:, the trapping or subsequent products of which can be isolated in good to very good yields. The silanediyl generated from 1a by α-elimination does not dimerize to tBu4Si2, but instead produces the four-membered ring compound 3 in 15% yield.
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Boudjouk et al. (1988) studied this question.
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