Safety Reference
Warning
H317May cause an allergic skin reaction
H319Causes serious eye irritation
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(S)-N-Boc-2-pyrrolidone-5-carboxylic acid tert-butyl ester
pharmaceutical intermediate
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N-tert-butoxycarbonyl-L-pyroglutamic acid methyl ester is a protected amino acid derivative commonly employed as a pharmaceutical intermediate. Its primary significance lies in its use for peptide synthesis, where the tert-butoxycarbonyl (Boc) group serves as a temporary protecting group for the amine functionality.
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.
The international HS code for 1-O-tert-butyl 2-O-methyl (2S)-5-oxopyrrolidine-1,2-dicarboxylate (CAS 108963-96-8) is 2933.79.
2933.79
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.
1-O-tert-butyl 2-O-methyl (2S)-5-oxopyrrolidine-1,2-dicarboxylate
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CC(C)(C)OC(=O)N1[C@@H](CCC1=O)C(=O)OC