L-Asparagine tert.butyl ester

L-Asparagine tert.butyl ester is a protected amino acid ester derived from the side-chain amide amino acid L-asparagine, featuring an asparagine backbone with the carboxyl group converted to a tert-butyl ester while retaining the free amino functionality. The molecule contains an amino group and an esterified carboxyl group, and its side chain bears a primary amide capable of hydrogen bonding, with the stereochemistry indicated as L by the product name. As an amino acid ester suitable for stepwise peptide synthesis and related derivative preparation, it functions as a protected, carboxyl-activated building block where the tert-butyl ester can be used to control chemoselectivity during coupling and subsequent deprotection to regenerate the free carboxyl group.

Designed for biological research and industrial applications, not intended for individual clinical or medical purposes.

CAT No: CP00333

CAS No:25456-86-4

Synonyms/Alias:L-Asparaginetert-butylester;25456-86-4;H-Asn-OtBu;(S)-tert-Butyl2,4-diamino-4-oxobutanoate;H-ASN-OBUT;AC1ODX0H;Asparaginetert-butylester;(L)-asparagine-t-butylester;SCHEMBL594264;Jsp005047;(L)-asparaginetert-butylester;CTK3J1724;MolPort-005-938-087;VLLGKVRQXXHELH-YFKPBYRVSA-N;ACT05201;ANW-42984;SBB070306;ZINC54967509;AKOS006281630;AKOS015841381;AC-3545;RTX-012391;AK-41587;BC215070;KB-53135

Custom Peptide Synthesis
cGMP Peptide
  • Registration of APIs
  • CMC information required for an IND
  • IND and NDA support
  • Drug master files (DMF) filing
M.F/Formula
C8H16N2O3
M.W/Mr.
188.2
Abbr
H-Asn-OtBu
InChI
1S/C8H16N2O3/c1-8(2,3)13-7(12)5(9)4-6(10)11/h5H,4,9H2,1-3H3,(H2,10,11)/t5-/m0/s1
InChI Key
VLLGKVRQXXHELH-YFKPBYRVSA-N
Canonical SMILES
CC(C)(C)OC(=O)C(CC(=O)N)N

Useful Tools

Peptide Calculator

Abbreviation List

Peptide Glossary

If you have any peptide synthesis requirement in mind, please do not hesitate to contact us at . We will endeavor to provide highly satisfying products and services.

Featured Services
Peptide Nucleic Acids SynthesiscGMP Peptide ServicePeptide Analysis ServicesPeptide Modification ServicesCustom Conjugation ServicePeptide Synthesis ServicesEpitope Mapping ServicesPeptide CDMO
Hot Products
About us

Creative Peptides is a trusted CDMO partner specializing in high-quality peptide synthesis, conjugation, and manufacturing under strict cGMP compliance. With advanced technology platforms and a team of experienced scientists, we deliver tailored peptide solutions to support drug discovery, clinical development, and cosmetic innovation worldwide.

From custom peptide synthesis to complex peptide-drug conjugates, we provide flexible, end-to-end services designed to accelerate timelines and ensure regulatory excellence. Our commitment to quality, reliability, and innovation has made us a preferred partner across the pharmaceutical, biotechnology, and personal care industries.

Our Customers