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Although attempts were made, these reactions were too fast to allow NMR studies to be revealing of possible ynamido-allyl complexes even at 25 °C. Only the starting ynamide 7 and silyl ketenimine 9 (and amidine 10 if the reaction was run in the presence of an amine) were clearly on display spectroscopically.
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Although attempts were made, these reactions were too fast to allow NMR studies to be revealing of possible ynamido-allyl complexes even at 25 °C. Only the starting ynamide 7 and silyl ketenimine 9 (and amidine 10 if the reaction was run in the presence of an amine) were clearly on display spectroscopically.
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