Fmoc-L-Asp(OtBu)-OH

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Fmoc-L-Asp(OtBu)-OH (CAS No. 71989-14-5) is a side-chain protected form of aspartic acid designed for use in solid-phase peptide synthesis. The Fmoc group protects the amino group, while the tert-butyl ester shields the carboxylic acid side chain, making it suitable for stepwise elongation in peptide synthesis.

• CAS No.: 71989-14-5
• Molecular Formula: C₂₃H₂₅NO₆
• Purity: 99% min

• Appearance White crystal
• Molecular Weight 411.4 g/mol
• Density 1.3 ± 0.1 g/cm³
• Boiling Point 620.8 ± 55.0 °C at 760 mmHg
• Melting Point 148–150 °C (dec.)
• Flash Point 329.3 ± 31.5 °C
• Packaging 25 kg / fibre drum
• Storage Conditions Seal and store at 2–8 °C
• Customs Code 29242990

• Product Name
  1. Fmoc-Asp(OtBu)-OH;
  2. Fmoc-L-Asp(OtBu)-OH;
  3. (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-4-(tert-butoxy)-4-oxobutanoic acid;
  4. Fmoc-L-Aspartic acid beta-tert-butyl ester
• Production Capacity 3 ton/month
• Applications Raw material for GLP-1 peptide synthesis, polypeptides, Semaglutide, and Tirzepatide