269107

Sigma-Aldrich

L-tert-Leucine

99%

Synonym(s):
L-α-tert-Butylglycine, (S)-2-Amino-3,3-dimethylbutyric acid
Linear Formula:
(CH3)3CCH(NH2)CO2H
CAS Number:
Molecular Weight:
131.17
Beilstein/REAXYS Number:
1721824
MDL number:
PubChem Substance ID:
NACRES:
NA.22

Quality Level

assay

99%

optical activity

[α]20/D −9.5°, c = 3 in H2O

optical purity

ee: 99% (GLC)

reaction suitability

reaction type: solution phase peptide synthesis

application(s)

peptide synthesis: suitable

mp

≥300 °C (lit.)

SMILES string

CC(C)(C)[C@H](N)C(O)=O

InChI

1S/C6H13NO2/c1-6(2,3)4(7)5(8)9/h4H,7H2,1-3H3,(H,8,9)/t4-/m1/s1

InChI key

NPDBDJFLKKQMCM-SCSAIBSYSA-N

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Application

L-tert-Leucine can be used:
  • As a key precursor in the synthesis of a chiral phosphinooxazoline ligand, (S)-tert-butylPHOX.
  • In the synthesis of chiral copper(II) polymers that can catalyze the kinetic resolution of secondary alcohols by acylation.
  • In metal-free tandem radical cyclization reactions to synthesize 6-alkyl/acyl phenanthridines.
  • In the preparation of tert-leucine-derived N-acetylthiazolidinethione auxiliary that provides high levels of diastereoselection in acetate aldol reactions with a variety of aldehydes.

Packaging

5, 25 g in glass bottle

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves

RIDADR

NONH for all modes of transport

WGK Germany

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

Certificate of Origin

Synthesis, structure and application of chiral copper (II) coordination polymers for asymmetric acylation.
Jammi S, et al.
Inorganic Chemistry, 47(12), 5093-5098 (2008)
Highly Selective Asymmetric Acetate Aldol Reactions of an N-Acetyl Thiazolidinethione Reagent.
Zhang Y, et al.
Organic Letters, 6(1), 23-25 (2004)
Use of unprotected amino acids in metal-free tandem radical cyclization reactions: divergent synthesis of 6-alkyl/acyl phenanthridines.
Lu S C, et al.
Royal Society of Chemistry Advances, 7(88), 55891-55896 (2017)
Preparation of (S)?tert?Butyl PHOX: (Oxazole, 4?(1, 1?Dimethylethyl)?2?[2?(Diphenylphosphino) Phenyl]?4, 5?Dihydro?(4S)?).
Krout M R, et al.
Organic Syntheses, 86, 181-193 (2003)
Shu-Lai Liu et al.
Bioprocess and biosystems engineering, 28(5), 285-289 (2005-10-26)
Penicillin G acylase (PGA) from Kluyvera citrophila immobilized on Amberzyml was used for enantioselective hydrolysis of N-phenylacetylated-DL-tert-leucine (N-Phac-DL-Tle) to produce L-tert-leucine (L-Tle). The effects of various organic cosolvents on hydrolysis of N-Phac-DL-Tle have been investigated in aqueous-cosolvent medium. It was...

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