Hohance Chemistry | Looshine (Shanghai) Pharmaceutical Technology Co., Ltd

CAS71989-14-5

I. Names

• Chinese Name: Fmoc-L-aspartic acid beta-tert-butyl ester
• Chinese Synonyms: Fmoc-L-aspartic acid beta-tert-butyl ester; FMOC-L-aspartic acid 4-tert-butyl ester; Fluorenylmethoxycarbonyl-aspartic acid-β-tert-butyl ester; Fluorenylmethoxycarbonyl-aspartic acid-4-tert-butyl ester; Fluorenylmethyl N-oxycarbonyl-L-aspartic acid BETA-tert-butyl ester; FMOC-L-aspartic acid BETA-tert-butyl ester, 98%+; FMOC-O-tert-butyl-aspartic acid; N-FMOC-L-aspartic acid 4-tert-butyl ester
• English Name: Fmoc-Asp(OtBu)-OH
• English Synonyms: Fmoc-(tBu)Asp-OH; cas:71989-14-5; Fmoc-L-aspartic acid β-tert-butyl ester ≥99.7% (HPLC, Chiral purity); N-ALPHA-(9-FLUORENYLMETHOXYCARBONYL)-L-ASPARTIC ACID BETA-T-BUTYL ESTER; N-ALPHA-(9-FLUORENYLMETHYLOXYCARBONYL)-L-ASPARTIC ACID BETA-TERT-BUTYL ESTER; N-ALPHA-(9-FLUORENYLMETHYLOXYCARBONYL)-L-ASPARTIC ACID BETA-T-BUTYL ESTER; N-9-FLUORENYLMETHYLOXYCARBONYL-L-ASPARTIC ACID BETA-T-BUTYL ESTER; N-9-FLUORENYLMETHYLOXYCARBONYL-L-ASPARTIC ACID BETA-TERT-BUTYL ESTER

II. Basic Identification

• CAS No.: 71989-14-5
• Molecular Formula: C₂₃H₂₅NO₆
• Molecular Weight: 411.45
• EINECS No.: 276-251-7

III. Physicochemical Properties

• Melting Point: 148-150°C (dec.)
• Specific Rotation: -25º (c=1, DMF 24ºC)
• Boiling Point: 530.45°C (rough estimate)
• Density: 1.2498 (rough estimate)
• Refractive Index: -25° (C=1, DMF)
• Solubility: Soluble in chloroform, dichloromethane, ethyl acetate, DMSO, acetone, etc.
• Acidity Coefficient (pKa): 3.57±0.23 (Predicted)
• Form: Powder crystal
• Color: White to off-white

IV. Storage Condition

• 2-8°C