HBTU
2-(1H-BENZOTRIAZOL-1-YL)-1,1,3,3-TETRAMETHYLURONIUM HEXAFLUOROPHOSPHATE

PRODUCT IDENTIFICATION

CAS NO. 94790-37-1

2-(1H-BENZOTRIAZOL-1-YL)-1,1,3,3-TETRAMETHYLURONIUM HEXAFLUOROPHOSPHATE

EINECS NO. unlisted
FORMULA C11H16F6N5OP
MOL WT. 379.24

H.S. CODE

 

TOXICITY

 

SYNONYMS Happy Birthday To You; 2-Hbtu;
2-(1H-benzotriazol-1-yl)-1,1,3,3-tetramethyluronium hexafluorophosphate; N,N,N',N'-Tetra-methyl- O-(1H-benzotri-azol-1-yl)-uronium hexafluoro-phosphate; o-(Benzotriazol-1-yl)-N,N,N',N'- tetramethyluronium hexafluorophosphate; O-Benzotriazol-1-yl-Tetramethyluronium Hexafluorophosphate;

PRICE

U$1,800.- (1kg)

CLASSIFICATION

COUPLING REAGENTS /

PHYSICAL AND CHEMICAL PROPERTIES

PHYSICAL STATE White crystalline powder
MELTING POINT 200 - 202 C
BOILING POINT  
SPECIFIC GRAVITY  
SOLUBILITY IN WATER 1g/10 ml acetonitrile (clear solution)
pH  
VAPOR DENSITY  

AUTOIGNITION

 

NFPA RATINGS

 

REFRACTIVE INDEX

 
FLASH POINT

 

STABILITY

Stable under ordinary conditions

APPLICATIONS

Carbodiimides are a group of organic compounds which have the resonance formula  N=C=N . Carbodiimide is formed by dehydration of urea or from thiourea. Carbodiimides are readily reacts with various form of amines and hydroxyl functional groups. Carbodiimides are used as dehydration agents and as activating agent of carboxylic acids to form esters or amides. The disubstituted carboxyl activating agents are used for crosslinking proteins to nucleic acids and formation of immunoconjugates in peptide synthesis. N,N'-dicyclohexylcarbodiimide (DCC) is one of the most common peptide coupling agents. It is a low melting point waxy solid; insoluble in water but highly soluble in common organic solvents like acetonitrile dichloromethane, dimethylformamide, and tetrahydrofuran. DCC is a potent allergen. N,N'-diisopropylcarbodiimide (DIC) is an alternative to DCC, DIC is a liquid and is not an allergen. 1-Ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC) is a water-soluble activating agent for amide bonding with primary amines. It also activates phosphate groups. Typically, it is utilized in the pH range 4.0-6.0 without buffers. In particular, amine and carboxylate buffers should be avoided. Carbodiimides are so active and cause racemization of the amino acid. Active esters are less reactive and less in danger of racemization. 1-Hydroxybenzotriazole (HOBt) and 1-hydroxy-7-aza-benzotriazole (HOAt) are substances that react with the O-acylurea to form active esters. HOAt is a condensation additive in peptide synthesis. It efficiently speeds up coupling process, reduces the loss of chiral integrity, and provides a visual indication (yellow to colorless) of the reaction course. Other active esters exit as non-nucleophilic anionic salts of uronium or phosphonium such as O-(Benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate(HBTU), O-(7-Azabenzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate (HATU), (Benzotriazol-1-yloxy)tripyrrolidinophosphonium hexafluorophosphate (PyBOP).

HBTU is a peptide coupling reagent giving high yields with minimal racemisation, simple reaction conditions and short reaction time.

SALES SPECIFICATION

APPEARANCE

White crystalline powder

PURITY (HPLC)

99.0% min

LOSS ON DRYING 0.5% max
TRANSPORTATION
PACKING  
HAZARD CLASS Not regulated
UN NO.  
OTHER INFORMATION
Hazard Symbols: XN, Risk Phrases: 20/21/22/36/37/38, Safety Phrases: 26/36/37/39