A two-step route to Boc-protected α-alkylidene-β-amino esters was developed by addition of sodium tert-butylcarbamate to ethyl 2-diethoxyphosphoryl-2-alkenoates followed by the Horner-Wadsworth-Emmons olefination of aldehydes using intermediate 2-diethoxyphosphoryl-3-tert-butoxycarbonylaminoalkanoates.
通过将
叔丁基氨基甲酸钠加到 2-二乙氧基
磷酰-2-烯酸
乙酯中,然后使用 2-二乙氧基
磷酰-3-叔丁氧羰基
氨基烷酸
乙酯中间体进行醛的霍纳-沃兹沃斯-埃蒙斯烯化反应,开发出了一条分两步制备 Boc 保护的δ-亚烷基δ-
氨基酯的路线。