N-Boc-D-丙氨酰胺主要作为医药中间体,用于相关药物合成研究。
医药
合成路线 1(1. 合成:78981-25-6)
产率:89%
合成条件:Stage #1: With chloroformic acid ethyl ester; triethylamine In tetrahydrofuran at -10℃; for 1 h; Inert atmosphere Stage #2: With ammonia In tetrahydrofuran at -10 - 20℃; Inert atmosphere
实验步骤:通用方法:在-10℃下向搅拌的N-Boc-(R) - 丙氨酸(5.0g,26.4mmol)的无水THF溶液中加入三乙胺(3mL,21.12mmol)和氯甲酸乙酯(2.5mL, 26.4mmol)。 将反应混合物搅拌1小时,然后鼓入NH 3(g)1.5小时。 然后将混合物在室温下搅拌过夜。 然后,在减压下除去THF,之后加入NaCl。溶胶。 加入(40mL)并用EtOAc(5×40mL)萃取。 用0.5M HCl(2×30mL)洗涤有机层,用Na 2 SO 4干燥,过滤,真空蒸发,得到酰胺。
参考文献:
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合成路线 2(2. 合成:78981-25-6)
产率:100%
合成条件:With ammonium hydroxide In methanol; water at 20℃; for 16 h;
实验步骤:将Boc-Ala-OMe(5.000g,24.6mmol,1.0当量)和28%氢氧化铵水溶液(100.00mL,1479.7mmol,60.1当量)在甲醇(100mL)中的混合物在室温下搅拌16小时。 将反应混合物真空浓缩,得到所需产物,为白色固体(4.65g,100%)。 1H NMR(300MHz,CDCl3):δ6.15(br,1H),5.55(br,1H),4.95(br,1H),4.20(br,1H),1.46(s,9H),1.39(d,3H) ,J = 7.2Hz)。
参考文献:
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