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- W365329788 abstract "When an aqueous solution of urea and pyruvic acid was heated under reflux in the presence of formic acid, 2-ureidopropionic acid, that is, N-carbamoylalanine, was obtained in the yield of about 35%. This compound was considered to be formed by Leuckart reaction, in which N-alkylation is achieved by formic acid reduction of primarily formed Schiff base of a ketone and an amine. It had been believed that Leuckart reaction of amides or urea with formaldehyde does not afford N-alkylated products. Although the intended reaction practically failed to proceed below 100 C, we found that this reaction can be applied to the alkylation of urea at 100 and 120 C. This study proposed a novel pathway leading to formation of alanine from precursors, which are likely present on the primitive Earth. The formation of N-carbamoylalanine is of another significance, since we found in a separate experiment that it undergoes thermal polymerization." @default.
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- W365329788 date "2004-02-28" @default.
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- W365329788 title "FORMATION OF N-CARBAMOYLALANINE FROM UREA AND PYRUVIC ACID IN AQUEOUS FORMIC ACID" @default.
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