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Chemical product profile

HONGKUN / PRODUCT DIRECTORY

Diethyl acetamidomalonate | CAS 1068-90-2

An acetamido-substituted malonate building block for constructing amino-acid side chains, combining two ethyl esters with a protected nitrogen function for subsequent carbon-skeleton elaboration.

CAS1068-90-2
Molecular formulaC9H15NO5
Molecular weight217.22 g/mol

Product overview

The central carbon of diethyl acetamidomalonate carries an acetamido group between two ester functions. This arrangement provides a protected nitrogen-bearing carbon unit for amino-acid synthesis. The starting molecule is not supplied as an individual amino-acid enantiomer. Qualification should establish intact diester identity and distinguish chromatographic purity from water or partially hydrolysed material.

Chemical identity

Chemical name
Diethyl acetamidomalonate
CAS number
1068-90-2
Molecular formula
C9H15NO5
Molecular weight
217.22 g/mol

Application context

Acetamidomalonate chemistry uses carbon substitution followed by transformations of the ester and acetamido functions to access amino-acid derivatives. Published work includes preparation of 4-methylene-DL-glutamic acid. The side chain and stereochemical outcome belong to the selected route; an achiral starting reagent does not determine the final amino-acid configuration. For route trials, specify the required assay basis and evaluate ester-related impurities against the intended conversion.

Chemistry and synthetic role

The two ester carbonyls activate the intervening carbon, while the acetyl group masks the amino function during carbon–carbon bond construction.

Quality review

Check diester integrity

Use structural identification and chromatography to distinguish the diethyl ester from hydrolysed derivatives.

Define the malonate impurity profile

Agree reporting of relevant malonate starting materials and substituted by-products for the chosen route.

Separate water from organic purity

Include a water method when alkylation or activation is sensitive to moisture.

Preparing a specification

Specify intact diethyl acetamidomalonate, assay method and basis, water and relevant ester-related substances. Identify the amino-acid route when requesting a qualification sample.

Packaging and storage

Confirm container compatibility, closure and net weight for the selected grade and destination. Follow the actual supplier SDS and batch label for storage and transport.

Documentation

Request the batch COA, SDS and analytical methods covering the agreed purchasing specification. Confirm which supporting chromatograms and application-specific records are available from the selected manufacturer.

Procurement questions

Does this reagent specify an L-amino acid?

No. The starting structure has no defined stereocentre; the synthesis must establish the desired configuration.

Why does ester identity matter?

Partial hydrolysis changes functionality and the amount of intact substrate charged to a reaction.

Is a chromatographic percentage sufficient for dosing?

State whether dosing uses mass assay or area purity and how water is handled.

Technical sources
  1. PubChem CAS identity lookupNCBI / PubChem
  2. Diethyl acetamidomalonate A0015TCI
  3. Diethyl acetamidomalonate D84601Sigma-Aldrich