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中文摘要：
以L-苯丙氨酸为原料,经甲酯化反应制得中间体丙谷胺酸甲酯盐酸盐（1）;以三乙胺为缚酸剂,1经固体光气活化制得苯丙氨酸异氰酸酯后,再分别与伯胺反应合成了4个苯丙氨酸脲类化合物（3a-3d）,收率90.7%-94.2%,其结构经^1H NMR,MS和X-衍射确证。
英文摘要：
An intermediate,1-methoxy-1-oxo-3-phenylpropan-2-aminium chloride（ 1）,was prepared by methyl-esterification of L-phenylalanine. Four L-phenylalanine Derivatives in yield of 90. 7% -94. 2 were synthesized by activation of 1 via triphosgene,using triethylamine as the acid acceptor,and then reacted with primary amine. The structures were confirmed by^1 H NMR,MS and X-ray diffraction.
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