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The reaction of p-toluenesulfonyl azides with several silyl ketene acetals has been investigated. 1-Trimethylsilyloxy-ethylene reacted with TsN 3 to give a good yield of N-p-toluenesulfonyl substituted glycinates exclusively. However, during the reaction of 1-trimethylsilyloxy-propene with TsN 3 , an unexpected alkoxyl migration occurred to give N-acylsulfonyl amides; other products,...
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