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L00173 Trimethylsilyl azide, 94%

CAS Number

Stock No. Size Price ($) Quantity Availability
L00173-06 5g 30.60
L00173-14 25g 85.70
L00173-22 100g 255.00
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Trimethylsilyl azide, 94%


Chemical Properties

Formula Weight
Melting point
Boiling Point
Flash Point
Refractive Index
Storage & Sensitivity
Keep Cold. Moisture Sensitive.
Miscible with toluene, dichloromethane, diethyl ether and most organic solvents.


Trimethylsilyl azide is used as an azidonation reagent for amines, amides, aldehydes and ketones. It is involved in the preparation of alfa- and beta-siloxy azides from carbonyl compounds and epoxides. It is also used in the preparation of heterocyclic compounds and also acts as an effective substitute for hydrazoic acid. Further, it is used in the Oseltamivir total synthesis.


Moisture sensitive. Store in a cool place. Incompatible with strong oxidizing agents and strong acids.

Literature References

A mild, convenient synthesis of alkyl azides involves SN2 reaction with the corresponding alkyl halide, phosphate or tosylate, promoted by TBAF: Synthesis, 376 (1995).

Non-explosive hydrazoic acid equivalent in many cycloaddition reactions: e.g. with alkynes to give 1,2,3-triazoles: Chem. Ber., 99, 2512 (1966), nitriles, catalyzed by Di-n-butyl­tin oxide, L14491 , to give tetrazoles: J. Org. Chem., 58, 4139 (1993).

Curtius reaction with acid halides gives isocyanates in one operation: Synth. Commun., 2, 227 (1972): Synthesis, 551 (1972); J. Org. Chem., 38, 2982 (1973). Similarly, pyridine-2,3-dicarboxylic anhydride is converted to 3-azaisatoic anhydride: Synthesis, 972 (1982):

In combination withSnCl4,ß-D-ribofuranosyl acetates are converted to azides: Carbohydr. Res., 232, 359 (1992). Similarly, reaction with tert-halides in the presence of tin(IV) chloride gives tert-azides, which can be converted to iminophosphoranes by Staudinger reduction with Triethyl­ phosphite, L00339 . Hydrolysis completes a one-pot sequence for the conversion of a tert-halide to the corresponding amine: Synthesis, 487 (1987).

In combination with triflic acid, is useful for the direct amination of aromatics. Aminodiazonium triflate is suggested as the active intermediate. Thus, benzene gives aniline in 95% yield and toluene gives a mixture of o- and p-toluidine: J. Org. Chem., 54, 1203 (1989). See also: Tetrahedron Lett., 32, 4321 (1991).

Mitsunobu reaction, in the presence of DIAD, with 1,2- and 1,3-diols leads to regioselective, stereospecific azidation to give predominantly the 2- or 3-azido alcohol with inversion of configuration: J. Org. Chem., 64, 6049 (1999).

For reviews, see: Chem. Soc. Rev., 7, 15 (1978); Synthesis, 861 (1980); Chem. Rev., 88, 351 (1988).

Cui, T.; Smith, R.; Zhu, X. Stereoselective synthesis of alpha-glycosyl azides by ring-opening of 1, 6-anhydrosugars with trimethylsilyl azide. Carbohydr. Res. 2015, 416, 14-20.

Tandiary, M. A.; Masui, Y.; Onaka, M. A combination of trimethylsilyl chloride and hydrous natural montmorillonite clay: an efficient solid acid catalyst for the azidation of benzylic and allylic alcohols with trimethylsilyl azide. RSC Adv. 2015, 5 (20), 15736-15739.

GHS Hazard and Precautionary Statements

Hazard Statements: H225-H301-H311-H331

Highly flammable liquid and vapour. Toxic if swallowed. Toxic in contact with skin. Toxic if inhaled.

Precautionary Statements: P210-P233-P235-P240-P241-P242-P243-P261-P264b-P270-P271-P280-P301+P310-P303+P361+P353-P304+P340-P311-P312-P330-P363-P370+P378q-P501c

Keep away from heat/sparks/open flames/hot surfaces. - No smoking. Keep container tightly closed. Keep cool. Ground/bond container and receiving equipment. Use explosion-proof electrical/ventilating/lighting/ equipment. Use only non-sparking tools. Take precautionary measures against static discharge. Avoid breathing dust/fume/gas/mist/vapours/spray. Wash face, hands and any exposed skin thoroughly after handling Do not eat, drink or smoke when using this product. Use only outdoors or in a well-ventilated area. Wear protective gloves/protective clothing/eye protection/face protection. IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. Call a POISON CENTER or doctor/physician. Call a POISON CENTER or doctor/physician if you feel unwell. Rinse mouth. Wash contaminated clothing before reuse. In case of fire: Use CO2, dry chemical, or foam Dispose of contents/ container to an approved waste disposal plant

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