Skip to product details

Chemical product profile

HONGKUN / PRODUCT DIRECTORY

L-Glutamic acid 1-tert-butyl ester hydrochloride | CAS 144313-55-3

A regioselectively protected L-glutamate whose alpha-carboxyl group is a tert-butyl ester, leaving the side-chain acid available for synthetic elaboration and the amino group in hydrochloride form.

CAS144313-55-3
Molecular formulaC9H18ClNO4
Molecular weight239.69 g/mol

Product overview

The numeral 1 identifies the ester position and is central to procurement. H-Glu-OtBu·HCl protects the alpha-carboxyl group, whereas H-Glu(OtBu)-OH protects the side-chain carboxyl group. These materials provide different reactive handles. This record concerns the L-configured hydrochloride with a free side-chain acid and an unprotected amino group.

Chemical identity

Chemical name
L-Glutamic acid 1-tert-butyl ester hydrochloride
CAS number
144313-55-3
Molecular formula
C9H18ClNO4
Molecular weight
239.69 g/mol

Application context

In amino-acid derivative development, differentiated carboxyl groups allow functionalization to be directed toward the glutamate side chain while retaining the alpha ester. The amino hydrochloride must also be accounted for in the protection and coupling strategy. Specify the full structure when comparing offers, and assess positional-isomer and partially deprotected content before route qualification.

Chemistry and synthetic role

The molecule combines an alpha tert-butyl ester, a free gamma-carboxyl group and a protonated amino function; the alpha carbon has L configuration.

Quality review

Identify the ester position

Use NMR or another discriminating method to separate alpha protection from side-chain protection.

Verify L configuration

Specify stereochemical identity and an appropriate enantiomeric test.

Measure salt and deprotection profile

Agree chloride, water and free glutamic-acid reporting for the chosen assay basis.

Preparing a specification

Specify the alpha tert-butyl ester hydrochloride, L configuration, ester-position identification, assay basis, chloride and deprotected related substances.

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

Is this H-Glu(OtBu)-OH?

No. The tert-butyl group here protects the alpha-carboxyl group.

Is the amino group protected?

It is present as a hydrochloride, not an N-Boc or N-Fmoc derivative.

What should accompany the product name?

Provide the structure showing ester position 1 and the hydrochloride form.

Technical sources
  1. PubChem CAS identity lookupNCBI / PubChem
  2. H-Glu-OtBu hydrochloride SY110417Accela ChemBio