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Home/Compounds/Pharmaceutical Intermediate/L-Pyroglutamic acid tert-butyl ester
C9H15NO3
185.22 g/mol
Pharmaceutical IntermediateWarning

Tert-Butyl 5-oxo-L-prolinate

CAS35418-16-7EC252-555-5
Category
Pharmaceutical Intermediate
Compound Class
Ester
Primary Use
Pharmaceutical Intermediate

tert-Butyl 5-oxo-L-prolinate is a chiral compound used as a pharmaceutical intermediate. It is primarily applied in peptide synthesis, where its protected amino acid structure facilitates the construction of peptide chains.

Pharmaceutical intermediate for peptide synthesis

Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.

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Related Compounds

ReferenceSame Category

1-Methyl-5-nitro-1H-benzimidazole-2-butanoic acid ethyl ester

CAS3543-72-4

pharmaceutical intermediate

ReferenceSame Category

1-Methyl-5-amino-1H-benzimidazole-2-butanoic acid ethyl ester

CAS3543-73-5

pharmaceutical intermediate

ReferenceSame Category

5-[Bis(2-hydroxyethyl)amino]-1-methyl-1H-benzimidazole-2-butanoic acid ethyl ester

CAS3543-74-6

pharmaceutical intermediate

ReferenceSame Category

4-Aminobenzyl cyanide

CAS3544-25-0

pharmaceutical intermediate

Referencestereoisomer of

D-Pyroglutamic acid tert-butyl ester

CAS205524-46-5

pharmaceutical intermediate

Safety Reference

Harmful
Harmful
Warning
H315Causes skin irritation
H319Causes serious eye irritation

Customs Tariff Classification

The international HS code for Tert-Butyl 5-oxo-L-prolinate (CAS 35418-16-7) is 2933.79.

HS code (international, 6-digit)

2933.79

EU CN code (8-digit)

2933 79 00

Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.

Identifiers
IUPAC Name

tert-butyl (2S)-5-oxopyrrolidine-2-carboxylate

InChIKey

QXGSPAGZWRTTOT-LURJTMIESA-N

SMILES

CC(C)(C)OC(=O)[C@@H]1CCC(=O)N1

Synonyms (21)
  • (S)-tert-Butyl pyroglutamate
  • H-Pyr-OtBu
  • t-butyl pyroglutamate
  • tert-Butyl 5-oxo-L-prolinate
  • tert-Butyl L-Pyroglutamate

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