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71989-18-9 Usage

Chemical Properties

White powder


Fmoc-Glu(OtBu)-OH (Fmoc-L-glutamic acid 5-tert-butyl ester) can be employed as a: Ligand in the synthesis of cis-substituted cyclopropane carboxylic acids via C-H activation of cyclopropane carboxamides using Pd catalyst.Linker in the preparation of multi-small molecule-conjugated PTX (paclitaxel) derivatives.It can be also used as a building block in the preparation of stapled α-helical peptides , and peptide C-terminal thioesters .

General Description

The product number for this product was previously 04-12-1020.To obtain a certificate of analysis (CoA) of a lot that begins with the letter “A”, please select the option in the right hand menu “Request a COA for Lot#s starting with A”.

Check Digit Verification of cas no

The CAS Registry Mumber 71989-18-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,9,8 and 9 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 71989-18:
169 % 10 = 9
So 71989-18-9 is a valid CAS Registry Number.

71989-18-9 Well-known Company Product Price

  • Brand
  • (Code)Product description
  • CAS number
  • Packaging
  • Price
  • Detail
  • TCI America

  • (B3167)  5-tert-Butyl N-[(9H-Fluoren-9-ylmethoxy)carbonyl]-L-glutamate Hydrate  >98.0%(HPLC)(T)

  • 71989-18-9

  • 5g

  • 530.00CNY

  • Detail
  • TCI America

  • (B3167)  5-tert-Butyl N-[(9H-Fluoren-9-ylmethoxy)carbonyl]-L-glutamate Hydrate  >98.0%(HPLC)(T)

  • 71989-18-9

  • 25g

  • 1,590.00CNY

  • Detail
  • Alfa Aesar

  • (H59169)  N-Fmoc-L-glutamic acid 5-tert-butyl ester, 98%   

  • 71989-18-9

  • 5g

  • 831.0CNY

  • Detail
  • Alfa Aesar

  • (H59169)  N-Fmoc-L-glutamic acid 5-tert-butyl ester, 98%   

  • 71989-18-9

  • 25g

  • 1976.0CNY

  • Detail
  • Aldrich

  • (47625)  Fmoc-Glu(OtBu)-OH  ≥98.0% (HPLC)

  • 71989-18-9

  • 47625-10G

  • 1,251.90CNY

  • Detail
  • Aldrich

  • (47625)  Fmoc-Glu(OtBu)-OH  ≥98.0% (HPLC)

  • 71989-18-9

  • 47625-25G

  • 2,197.26CNY

  • Detail
  • Aldrich

  • (47625)  Fmoc-Glu(OtBu)-OH  ≥98.0% (HPLC)

  • 71989-18-9

  • 47625-100G

  • 3,005.73CNY

  • Detail



According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 12, 2017

Revision Date: Aug 12, 2017


1.1 GHS Product identifier

Product name Fmoc-Glu(OtBu)-OH Hydrate

1.2 Other means of identification

Product number -
Other names Fmoc-L-glutamic acid 5-tert-butyl ester

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:71989-18-9 SDS

71989-18-9Relevant articles and documents

High-efficiency industrial production method of Fmoc-Glu (Otbu)-OH


Paragraph 0026; 0031-0035; 0040-0043, (2020/02/19)

The invention relates to the field of organic synthesis, and especially relates to the technical field of a high-efficiency industrial production method of Fmoc-Glu (Otbu)-OH. The method comprises thefollowing steps: synthesizing an intermediate [Glu(OtBu)]2Cu, and then synthesizing the target product Fmoc-Glu (Otbu)-OH. The method has the advantages of great reduction of reaction steps, and goodcontrol of the reaction process. The industrial production method of the Fmoc-Glu (Otbu)-OH can efficiently and stably produce the high-quality Fmoc-Glu (Otbu)-OH, so the purity is greater than 99.5%, and the content of a single impurity is less than 0.1%.

Synthesis of l -octaarginine through microencapsulated palladium-catalyzed allyl ester deprotection

Pérez-López, Ana M.,González-Calderón, Dávir,Occorso, Antonio,Galindo-ángel, Javier,Domínguez-Seglar, José F.,Tamayo, Juan A.,Díaz-Gavilán, Mónica,Gómez-Vidal, José A.

supporting information, p. 2319 - 2322 (2015/08/06)

Octaarginine has been described as a molecular transporter. We report a useful synthesis of orthogonally protected l-octaarginine by using a method based on a microencapsulated palladium catalyst. Known palladium-based methods for allyl ester deprotection have been modified to facilitate purification of the unprotected intermediates. This improvement in the purification step has also been tested with a variety of allyl α-amino esters and allyl α,β-unsaturated esters.

Efficient procedure for the preparation of oligomer-free N-fmoc amino acids

Nowshuddin, Shaik,Rao,Reddy, A. Ram

experimental part, p. 2022 - 2031 (2009/11/30)

A two-step method is presented for the peptide-free, high-purity, and high-yield synthesis of N-Fmoc amino acids. The first step involves the preparation of stable dicyclohexylammonium-amino acid ionic adduct in acetone. Subsequently, the ionic adducts, on reaction with Fmoc-Nosu under mild alkaline conditions, give dipeptide-free N-Fmoc amino acids. The positive charge of the dicyclohexylammonium counterion in the ionic salt has a longer radius, moderating the nucleophilicity of the carboxylate ion of the amino acid and preventing by-products by arresting the formation of mixed anhydrides, the precursors of oligopeptide impurities.

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