8.51006
HBTU
≥99.0% (HPLC), for peptide synthesis, Novabiochem®
Synonym(s):
HBTU, 2-(1H-Benzotriazole-1-yl)-1,1,3,3-tetramethylaminium hexafluorophosphate
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About This Item
Empirical Formula (Hill Notation):
C11H16F6N5OP
CAS Number:
Molecular Weight:
379.24
UNSPSC Code:
12352107
EC Index Number:
423-020-5
NACRES:
NA.22
MDL number:
Product Name
HBTU, 2-(1H-Benzotriazole-1-yl)-1,1,3,3-tetramethyluronium hexafluorophosphate Novabiochem®
Quality Segment
product line
Novabiochem®
assay
≥99.0% (HPLC)
form
powder
potency
>2000 mg/kg LD50, oral (Rat)
reaction suitability
reaction type: Coupling Reactions
manufacturer/tradename
Novabiochem®
pH
4.1 (1.6 g/L in H2O)
mp
250 °C
solubility
1.6 g/L
application(s)
peptide synthesis
storage temp.
2-8°C
SMILES string
[N+](=C(N(C)C)O[n]1nnc2c1cccc2)(C)C
InChI
1S/C11H16N5O/c1-14(2)11(15(3)4)17-16-10-8-6-5-7-9(10)12-13-16/h5-8H,1-4H3/q+1
InChI key
CLZISMQKJZCZDN-UHFFFAOYSA-N
General description
TBTU and HBTU are two of the most popular in situ activation reagents used in solid phase and solution phase peptide synthesis [1,2,3,4,5,6,7,8,9]. These reagents offer reactivity similar to symmetrical anhydrides and BOP [1]. Couplings proceed smoothly and rates can even be enhanced by the addition of HOBt [2,4,5,6]. In addition to having high reactivity, TBTU and HBTU have also been shown to limit enantiomerization during fragment condensation and during DMAP catalyzed esterification of arginine derivatives [3]. Comparative experiments between HBTU and TBTU have shown that the counter ion has no influence on coupling rates or levels of enantiomerization [1].
Associated Protocols and Technical Articles
Guide to Selection of Coupling Reagents
Literature references
[1] R. Knorr, et al. (1989) Tetrahedron Lett., 30, 1927.
[2] M. S. Bernatowicz, et al. (1989) Tetrahedron Lett., 30, 4645.
[3] D. Ambrosius, et al. (1989) Biol. Chem. Hoppe-Seyler, 370, 217.
[4] C. G. Fields, et al. (1991) Pept. Res., 4, 95.
[5] A. G. Beck-Sickinger, et al. (1991) Pept. Res., 4, 88.
[6] G. E. Reid, et al. (1992) Anal. Biochem., 200, 301.
[7] G. B. Fields, et al. in ′Innovation & Perspectives in Solid Phase Synthesis, 1st International Symposium′, R. Epton (Eds), SPCC UK Ltd., Birmingham, 1990, pp. 241.
[8] P. A. Baybayan, et al. in ′Peptides, Chemistry & Biology, Proc. 12th American Peptide Symposium′, J. A. Smith & J. E. Rivier (Eds), ESCOM, Leiden, 1992, pp. 566.
[9] J. J. Dudash, et al. (1993) Synth. Commun., 23, 349.
Associated Protocols and Technical Articles
Guide to Selection of Coupling Reagents
Literature references
[1] R. Knorr, et al. (1989) Tetrahedron Lett., 30, 1927.
[2] M. S. Bernatowicz, et al. (1989) Tetrahedron Lett., 30, 4645.
[3] D. Ambrosius, et al. (1989) Biol. Chem. Hoppe-Seyler, 370, 217.
[4] C. G. Fields, et al. (1991) Pept. Res., 4, 95.
[5] A. G. Beck-Sickinger, et al. (1991) Pept. Res., 4, 88.
[6] G. E. Reid, et al. (1992) Anal. Biochem., 200, 301.
[7] G. B. Fields, et al. in ′Innovation & Perspectives in Solid Phase Synthesis, 1st International Symposium′, R. Epton (Eds), SPCC UK Ltd., Birmingham, 1990, pp. 241.
[8] P. A. Baybayan, et al. in ′Peptides, Chemistry & Biology, Proc. 12th American Peptide Symposium′, J. A. Smith & J. E. Rivier (Eds), ESCOM, Leiden, 1992, pp. 566.
[9] J. J. Dudash, et al. (1993) Synth. Commun., 23, 349.
Application
- Synthesis of Quinoxaline Derivatives Using HBTU: A study highlighting the use of HBTU as a Lewis acid catalyst for synthesizing quinoxaline derivatives, presenting a mild and green protocol (Popatkar and Meshram, 2020).
- Efficient Conversion of Carboxylic Acids into Benzimidazoles: Details an HBTU-promoted methodology for converting carboxylic acids into benzimidazoles in a one-pot strategy (Barasa and Yoganathan, 2018).
- Synthesis of Malonyl-linked Glycoconjugates: Discusses the use of HBTU in the synthesis of glycoconjugates, comparing its efficiency with other reagents (Nörrlinger et al., 2016).
Analysis Note
Colour (visual): white to slight yellow to beige
Appearance of substance (visual): powder
Identity (IR): passes test
Assay (HPLC, area%): ≥ 99.0 % (a/a)
Solubility (1 mmole in 2 ml DMF): clearly soluble
Appearance of substance (visual): powder
Identity (IR): passes test
Assay (HPLC, area%): ≥ 99.0 % (a/a)
Solubility (1 mmole in 2 ml DMF): clearly soluble
Other Notes
Replaces: 01-62-0010
Legal Information
Novabiochem is a registered trademark of Merck KGaA, Darmstadt, Germany
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signalword
Warning
hcodes
Hazard Classifications
Skin Sens. 1A
Storage Class
11 - Combustible Solids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
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