Fmoc-L-glutamic acid 5-tert-butyl ester is a protected amino acid derivative used in solid-phase peptide synthesis. Its structure incorporates both an Fmoc (9-fluorenylmethoxycarbonyl) protecting group on the amino terminus and a tert-butyl ester protecting group on the side-chain carboxyl, enabling selective deprotection during peptide chain assembly.
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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Fmoc-L-Glutamic acid-O-tert-butyl ester hydrate
pharmaceutical intermediate
(S)-2-Fmoc-aminohexanedioic acid 6-tert-butyl ester
pharmaceutical intermediate
Fmoc-Glu(OtBu)-Phe-OH
pharmaceutical intermediate
N-Fmoc-N'-Boc-L-Lysine
pharmaceutical intermediate
Fmoc-L-Methionine
pharmaceutical intermediate
(2S)-1-(9H-fluoren-9-ylmethoxycarbonyl)pyrrolidine-2-carboxylic acid
pharmaceutical intermediate
Fmoc-O-tert-Butyl-L-serine
pharmaceutical intermediate
Fmoc-D-glutamic acid gamma-tert-butyl ester
pharmaceutical intermediate
The international HS code for Fmoc-L-glutamic acid 5-tert-butyl ester (CAS 71989-18-9) is 2924.29.
2924.29
2924 29 70
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
(2S)-2-(9H-fluoren-9-ylmethoxycarbonylamino)-5-[(2-methylpropan-2-yl)oxy]-5-oxopentanoic acid
OTKXCALUHMPIGM-FQEVSTJZSA-N
CC(C)(C)OC(=O)CC[C@@H](C(=O)O)NC(=O)OCC1C2=CC=CC=C2C3=CC=CC=C13
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