Highly efficient desilylation of 3-trimethylsilylprop-2-ynamides by the action of KF-Al2O3
摘要:
A highly effective procedure has been developed for desilylation of 3-trimethylsilylprop-2-ynamides in the presence of KF-Al2O3 as catalyst. The corresponding terminal prop-2-ynamides were obtained in high yield in methanol at 25 C using 5 mol % of the catalyst (reaction time 20 min). Rise in temperature leads to the formation of Z, E-3-methoxyprop-2-enamides or 3,3-dimethoxypropanamides as a result of tandem desilylation-addition of methanol, depending on the conditions.