HBTU

HBTU Basic information
Product Name:HBTU
Synonyms:O-(BENZOTRIAZOL-1-YL)-N-N-N ,N -TETRAMETHYLURONIUM HEXAFLUOROPHOSPHATE;O-BENZOTRIAZOL-1-YL-N,N,N',N'-TETRAMETHYLURONIUM HEXAFLUOROPHOSPHATE POLYMER BOUND;O-BENZOTRIAZOLE-1-YL-N,N,N',N'-TETRAMETHYLURONIUM HEXAFLUOROPHOSPHATE;O-BENZOTRIAZOLE-N,N,N',N'-TETRAMETHYL-URONIUM;O-BENZOTRIAZOLE-N,N,N',N'-TETRAMETHYL-URONIUM-HEXAFLUORO-PHOSPHATE;O-BENZOTRIAZOLE-N,N,N',N'-TETRAMTHYL-URONIUM-HEXAFLUORO-PHOSPHATE;N-[(1-H-BENZOTRIAZOL-1-YL)(DIMETHYLAMINO)METHYLENE]-N-METHYLMETHANAMINIUM HEXAFLUOROPHOSPHATE N-OXIDE;O-(1H-benzotriazol-1-y1)-N,N,N'N'-tetramethyluronium Hexafluorophosphate(HBTU)
CAS:94790-37-1
MF:C11H16F6N5OP
MW:379.25
EINECS:619-076-7
Product Categories:peptides;Peptide coupling agents;Starting Raw Materials & Intermediates;Peptide Coupling Reagents;PROTECTED AMINO ACID & PEPTIDES;Biochemistry;Condensation & Active Esterification;Coupling Reactions (Peptide Synthesis);Peptide Synthesis;Synthetic Organic Chemistry;Peptide;Amino Acid Derivatives
Mol File:94790-37-1.mol
HBTU Structure
HBTU Chemical Properties
Melting point 200 °C (dec.)(lit.)
Fp 200°C
storage temp. Store at +2°C to +8°C.
solubility acetonitrile: 0.1 g/mL, clear
form Powder
color White to Off-White
PH4.1 (1.6g/l, H2O)
Decomposition 200 ºC
BRN 7328329
Stability:Stable. Incompatible with oxidizing agents.
InChIKeyUQYZFNUUOSSNKT-UHFFFAOYSA-N
CAS DataBase Reference94790-37-1(CAS DataBase Reference)
EPA Substance Registry System1H-Benzotriazolium, 1-[bis(dimethylamino)methylene]-, 3-oxide, hexafluorophosphate(1-) (1:1) (94790-37-1)
Safety Information
Hazard Codes Xi,Xn
Risk Statements 36/37/38-20/21/22-42/43
Safety Statements 26-36/37/39-36-22
WGK Germany 3
8-10-21
Hazard Note Irritant
HS Code 29339980
ToxicityLD50 orally in Rabbit: > 2000 mg/kg
MSDS Information
HBTU Usage And Synthesis
Chemical Propertieswhite to light yellow powder
UsesPeptide coupling reagent which suppresses racemization.
Usespeptide coupling reagent that reduces racemization
UsesHBTU is a coupling reagent used in peptide synthesis. HBTU has been shown to effectively suppress racemization.
Biological Activityhbtu (2-(1h-benzotriazol-1-yl)-1,1,3,3-tetramethyluronium hexauorophosphate), a coupling reagent commonly used in solid phase peptide synthesis. after being introduced in 1978, this agent shows popularity in chemistry and industry use due to its mild activating properties. moreover, it also shows resistance against racemization. low tendency for racemization is a key requirement for peptide synthesis. especially for solid phase peptide synthesis, quantitative yields with short reaction times are crucial in order to make the synthesis of large peptides feasible. [1]
in vitropeptide synthesis relied mostly on efficient and safe coupling reagents. hbtu was proved to transform carboxylic acids into azides efficiently and practically. the process might be applied to a wide range of carboxylic acids including n-protected amino acids. in addition, hbtu was of great value in one-pot synthesis of dipeptidyl urea esters, ureas, and carbamates from acids. the advantages of hbtu included the following points: 1) non-explosive and therefore more suitable for solution/solid phase peptide synthesis. 2) high solubility and stability in classical solvents. 3) feasible for colorimetric reaction monitoring. [2]
Purification MethodsWash the salt with H2O (3x), CH2Cl2 (3x), dry and recrystallise it from MeCN. Dry it in a vacuum and store it cold in the dark [Dourtoglou et al. Tetrahedron Lett 1269 1978, NMR: Dourtoglou and Gross Synthesis 572 1984]. Benzoxazolinone (2 -hydroxybenzoxazole) [59 -49 -4] M 135.1, m 137 -139o, 142 -143o(corrected), b 121-213o/17mm, 335-337o/760mm. Benzoxazolinone is purified by recrystallisation from aqueous Me2CO followed by distillation at atmospheric pressure, then in a vacuum. The methyl mercury salt recrystallises from aqueous EtOH and has m 156-158o. [Bywater et al. J Am Chem Soc 67 905 1945, Beilstein 27 III/IV 2677.]
references[1]adam s. hbtu: a mild activating ageiw of muramic acid. bioorg med chem lett. 1992 mar; 2(6): 571-4.
[2]knorr r, trzeciak a, bannwarth w and gillessen d. new coupling reagents in peptide chemistry. tetrahedron lett. 1989; 30(15): 1927-30.
HBTU Preparation Products And Raw materials
Preparation ProductsMethanone, (3,3-difluoro-1-azetidinyl)[8,9-dihydro-9-methoxy-2,3-dimethyl-9-(2-methylphenyl)-7H-imidazo[1,2-a]pyrano[2,3-c]pyridin-6-yl]-
HOAt 2-(1H-Benzotriazole-1-yl)-1,1,3,3-tetramethyluronium tetrafluoroborate 2-(7-Azabenzotriazole-1-yl)-1,1,3,3-tetramethyluronium tetrafluoroborate 3-Hydroxy-1,2,3-benzotriazin-4(3H)-one Sodium hexafluorophosphate 5-Methyl-1H-benzotriazole HBTU Tolyltriazole O-BENZOTRIAZOL-1-YL-N,N,N′,N′-TETRAMETHYLURONIUM HEXAFLUOROPHOSPHATE (HBTU) O-BENZOTRIAZOL-1-YL-N,N,N',N'-TETRAMETHYLURONIUM HEXAFLUOROPHOSPHATE POLYMER BOU (Benzotriazol-1-yloxy)dipyrrolidinocarbenium hexafluorophosphate 1H-Benzotriazole 5-Chloro-1-[bis(dimethylamino)methylene]-1H-benzotriazolium 3-oxide hexafluorophosphate Ammonium hexafluorophosphate Hexafluorophosphoric acid O-BENZOTRIAZOL-1-YL-N,N,N',N'-TETRAMETHYLURONIUM HEXAFLUOROPHOSPHATE (HBTU) Potassium hexafluorophosphate Lithium hexafluorophosphate

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