The artificial sweetener aspartame (A),H_3N^{ | vedclass

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Question

(C) Aspartame ($L$-aspartyl-$L$-phenylalanine methyl ester) is unstable in aqueous solution.On storage for extended periods,the amino group of the asp

Vedclass · Accepted Answer

$A$ cyclic diketopiperazine derivative + $CH_3OH$

Vedclass · Answer

(C) Aspartame ($L$-aspartyl-$L$-phenylalanine methyl ester) is unstable in aqueous solution.On storage for extended periods,the amino group of the aspartic acid residue attacks the methyl ester of the phenylalanine residue.This intramolecular reaction leads to the formation of a cyclic diketopiperazine ($3$-benzyl$-6-$carboxymethyl$-2,5-$diketopiperazine) and the release of methanol $(CH_3OH)$.

Item $I$	Item $II$
$A$. Ester test	$P$. Tyr
$B$. Carbylamine test	$Q$. Asp
$C$. Phthalein dye test	$R$. Ser
	$S$. Lys

The artificial sweetener aspartame $(A)$,$H_3N^{+}-CH(CH_2COO^{-})-CONH-CH(CH_2Ph)-COOCH_3$,is converted to . . . . . . on storage for extended periods of time in aqueous solution:

Similar Questions

$NH_2-CH(CH_3)-CO-NH-CH_2-COOH$
Identify the amino acids obtained by the hydrolysis of the above compound.

Which of the following is an example of a protein?

During the denaturation of proteins,which of these structures will remain intact?

The correct match between Item $I$ and Item $II$ is

Item $I$ Item $II$

$A$. Ester test $P$. Tyr

$B$. Carbylamine test $Q$. Asp

$C$. Phthalein dye test $R$. Ser

$S$. Lys

The dipeptide,$Gln-Gly$,on treatment with $CH_3COCl$ followed by aqueous work-up gives:

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