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Diethyl azodicarboxylate acts as a dienophile used in Diels-Alder reactions. It is used as a reagent in alfa-thiocyanation of enolizable ketones with ammonium thiocyanate and annulation of N-protected imines. It acts as a reactant for the preparation of immunostimulants alfa-Galactosylceramides, bisubstrate inhibitors with molecular recognition at the active site of catechol-O-methyltransferase and aza-beta-lactams via NHC-catalyzed [2 + 2] cycloaddition with ketenes. It finds application in Mitsunobu reaction and used in the synthesis of pharmaceuticals like zidovudine and procarbazine. The presence of azo group in it is a Michael acceptor and used for the conversion of beta-ketoesters to the corresponding hydrazine derivatives in presence of copper(II) catalyst. Further, it is an efficient dehydrogenating agent, which is involved in the preparation of aldehydes, disulfides from alcohols and thiols respectively.
Explosion risk by heating undiluted material.
Dehydrogenating agent and aza-dienophile. Oxidizes alcohols to aldehydes, thiols to disulfides and hydrazo to azo groups: J. Am. Chem. Soc., 88, 2328 (1966). Arylhydroxylamines are converted in high yield to nitroso compounds: Chem. Commun., 199 (1967).
Undergoes pericyclic reactions with alkenes and dienes via both ene and Diels-Alder processes. For further details and references, see: Encyclopedia of Reagents for Organic Synthesis, L. A. Paquette, Ed., Wiley, Chichester (1995), vol. 3, p. 1790.
Secondary and tertiary amines have been dealkylated by reaction with DEAD under mild conditions, followed by acid hydrolysis: J. Org. Chem., 38, 1652 (1973).
In combination with Triphenylphosphine, L02502 , is widely used in the Mitsunobu reaction for activation of primary and secondary alcohols by formation of the alkoxyphosphonium salts, which behave as versatile alkylating agents under mild SN2 conditions: reactions normally proceed with inversion of configuration. For reviews, see: Synthesis, 1 (1981); Org. React., 42, 335 (1992); Org. Prep. Proced. Int., 28, 127 (1996); Synlett, 1221 (2003); Eur. J. Org. Chem., 2763 (2004):
For study of the mechanism, see: J. Org. Chem., 67, 1751 (2002).
Details for esterification of (-)-menthol with 4-nitrobenzoic acid with stereoinversion: Org. Synth. Coll., 9, 607 (1998). For an example of its use to convert a secondary alcohol to an amine by reaction with phthalimide followed by hydrazinolysis, see: Org. Synth. Coll., 7, 501 (1990). For dehydration of Boc-L-serine to the cyclic anhydride (2-oxetanone), see: Org. Synth. Coll., 9, 24 (1998).
ɑ-Amination of aldehydes can be effected in the presence of L-proline as an enantioselective catalyst, affording chiral ɑ-amino alcohols and ɑ-amino acids with good ee: Angew. Chem. Int. Ed., 41, 1790 (2002); for a similar reaction with scheme, see Dibenzyl azodicarboxylate, L19347 .
Wang, Y.; Frett, B.; McConnell, N.; Li, H. Y. Metal-free, efficient hydrazination of imidazo[1,2-a]pyridine with diethyl azodicarboxylate in neutral media. Org. Biomol. Chem. 2015, 13 (10), 2958-2964.
Xu, N.; Li, D.; Zhang, Y.; Wang, L. Palladium-catalyzed direct ortho-ethoxycarbonylation of azobenzenes and azoxybenzenes with diethyl azodicarboxylate. Org. Biomol. Chem. 2015, 13 (34), 9083-9092.
Hazard Statements: H227-H302-H315-H319-H332-H335
Combustible liquid. Harmful if swallowed. Causes skin irritation. Causes serious eye irritation. Harmful if inhaled. May cause respiratory irritation.
Precautionary Statements: P210-P235-P261-P264b-P270-P271-P280-P301+P312-P302+P352-P304+P340-P305+P351+P338-P312-P330-P332+P313-P337+P313-P362-P370+P378q-P501c
Keep away from heat/sparks/open flames/hot surfaces. - No smoking. Keep cool. 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: Call a POISON CENTER or doctor/physician if you feel unwell. IF ON SKIN: Wash with plenty of soap and water. 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. Rinse mouth. If skin irritation occurs: Get medical advice/attention. If eye irritation persists: Take off contaminated clothing and wash before reuse. In case of fire: Use CO2, dry chemical, or foam Dispose of contents/ container to an approved waste disposal plant