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Tetraphenylstibonium hydroxide was an effective catalyst for the reaction of trimethylsilyl azide with oxiranes to give silylated vicinal azidohydrins. This azidation reaction was chemoselective to the oxirane moieties, while aldehyde was tolerable under the reaction conditions. Tetraphenylstibonium azide arising from tetraphenylstibonium hydroxide and trimethylsilyl azide was assumed to be the azidation...
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