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A14688 1,1'-Carbonyldiimidazole, 97%

CAS Number

Stock No. Size Price ($) Quantity Availability
A14688-09 10g 39.90
A14688-18 50g 130.00
A14688-30 250g 418.00
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1,1'-Carbonyldiimidazole, 97%


Chemical Properties

Formula Weight
Melting point
Storage & Sensitivity
Moisture Sensitive. Store under Argon. Ambient temperatures.
Soluble in dimethylformamide.


Peptide coupling reagent1,1'-Carbonyldiimidazole acts as a coupling reagent and utilized for coupling of amino acids in order to prepare peptide in organic synthesis. It is also used in the preparation of beta-keto sulfones, sulfoxides and beta-enamino acid derivatives. It is used to convert alcohols and amines into carbamates, esters, and ureas. It is involved in the preparation of formylized imidazole by reaction with formic acid. Further, it is used in the synthesis of dipolar polyamides compounds. In addition to this, it is considered as an equivalent of phosgene and used to prepare asymmetric bis alkyl carbonate.


Store in a cool place. Incompatible with water, strong acids, strong oxidizing agents, strong bases and amines.

Literature References

Reagent for peptide coupling via the acylimidazolide: Liebigs Ann. Chem., 609, 75 (1957); J. Am. Chem. Soc., 80, 4423 (1958); 82, 4596 (1960): J. Org. Chem., 27, 2094 (1962). For peptide reagents, see Appendix 6.

One-pot esterification of a carboxylic acid with t-BuOH occurs in the presence of DBU: Synthesis, 833 (1982). The reactivity of acyl imidazolides can be increased by N-alkylation: Chem. Pharm. Bull., 32, 5044 (1984).

Acylimidazolides can also be reduced to aldehydes by DIBAL-H. This reaction has been applied to N-protected amino acids: J. Chem. Soc., Chem. Commun., 79 (1979).

Dehydrates aldoximes, including chiral oximes, to nitriles in high yield: J. Chem. Soc., Chem. Commun., 628 (1973); Synth. Commun., 12, 25 (1982). Ketoximes can be converted to amides by the spontaneous Beckmann rearrangement of imidazolium salts: Chem. Pharm. Bull., 32, 2560 (1984):

ß-Hydroxy amino acids are dehydrated to dehydroamino acids: Synthesis, 968 (1982).

ɑß-Dihydroxyketones are converted toɑ-diketones: Synth. Commun., 23, 2219 (1993).

Lanzillotto, M.; Konnert, L.; Lamaty, F.; Martinez, J.; Colacino, E. Mechanochemical 1,1'-Carbonyldiimidazole-Mediated Synthesis of Carbamates. ACS Sustainable Chem. Eng. 2015, 3 (11), 2882-2889.

Rodrigues, M. T.; Santos, M. S.; Santos, H.; Coelho, F. 1, 1'-Carbonyldiimidazole mediates the synthesis of N-substituted imidazole derivatives from Morita-Baylis-Hillman adducts. Tetrahedron Lett. 2014, 55 (1), 180-183.

Lafrance, D.; Bowles, P.; Leeman, K.; Rafka, R. Mild Decarboxylative Activation of Malonic Acid Derivatives by 1, 1'-Carbonyldiimidazole. Org. Lett. 2011, 13 (9), 2322-2325.

GHS Hazard and Precautionary Statements

Hazard Statements: H302-H314-H335

Harmful if swallowed. Causes severe skin burns and eye damage. May cause respiratory irritation.

Precautionary Statements: P260-P264b-P270-P280-P303+P361+P353-P304+P340-P305+P351+P338-P310-P330-P331-P363-P501c

Do not breathe 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. Wear protective gloves/protective clothing/eye protection/face protection. 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. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a POISON CENTER or doctor/physician. Rinse mouth. Do NOT induce vomiting. Wash contaminated clothing before reuse. Dispose of contents/ container to an approved waste disposal plant

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Harmonized Tariff Code


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