Pentacoordinated hydrosilanes react with excess of aryl isocyanates to give isocyanurates under mild and neutral conditions. The catalytic species are the initially formed N‐silylformamides, which incorporate three equivalents of isocyanate, and then rearrange to N‐silylformamide and isocyanurates.
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Corriu et al. (1991) studied this question.
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