[CH3:1][O:2][C:3](=[O:6])[CH2:4]Br.[O-:7][C:8]#[N:9].[K+].[CH3:11][OH:12]>CN(C=O)C>[CH3:1][O:2][C:3](=[O:6])[CH2:4][NH:9][C:8]([O:12][CH3:11])=[O:7]10.71 grams of monobromo acetic acid methyl ester, 8.52 grams of potassium cyanate and 7.85 grams of methanol were heated in 70 ml of DMF following the procedure of Example 1 gave 6.62 grams (64.3%) of methoxycarbonylamino acetic acid methyl ester having a boiling point of 67°-8° C./0.0013 mbar.
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