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Diisopropyl azodicarboxylate is used as an important reagent in the production of many organic compounds. It is used in association with triphenyl phosphine in Mitsunobu reaction of alcohols, acids and amides. It acts as reactant in the preparation of chromenes resembling classical cannabinoids, norbornene-based guanidine-rich polymers and acceptor-donor-acceptor organic dyes.
Alternative to 'DEAD' (Diethyl azodicarboxylate, L19348), more stable at elevated temperatures. DIAD has been used in combination with Triphenylphosphine, L02502, in Mitsunobu-type reactions of alcohols with acids, amides, etc. In the Mitsunobu esterification reaction yields improve with increasing acid strength. For a discussion, see: J. Org. Chem., 61, 2967 (1996).
For use in the regioselective, stereospecific Mitsunobu azidation of 1,2- and 1,3-diols with Trimethylsilyl azide, L00173, see: J. Org. Chem., 64, 6049 (1999).
An extremely mild route to isocyanates involves treatment of an aliphtic primary amine with CO2 to form the carbamate salt which reacts at low temperature with the Mitsunobu reagent from DIAD and PPh3, giving the isocyanate in high yield. 2,6-Dialkylanilines also undergo the reaction if Bu3P is used; the reaction failed with other anilines: Tetrahedron Lett., 40, 363 (1999).
For reviews of the Mitsunobu reaction, see: Synthesis, 1 (1981); Org. React., 42, 335 (1992); Org. Prep. Proced. Int., 28, 127 (1996). For a brief feature on synthetic uses of Mitsunobu reagents, see: Synlett, 1221 (2003).
Ryu, I.; Tani, A.; Fukuyama, T.; Ravelli, D.; Montanaro, S.; Fagnoni, M. Efficient C-H/C-N and C-H/C-CO-N Conversion via Decatungstate-Photoinduced Alkylation of Diisopropyl Azodicarboxylate. Org. Lett. 2013, 15 (10), 2554-2557.
Hayashi, M.; Shibuya, M.; Iwabuchi, Y. Oxidation of Alcohols to Carbonyl Compounds with Diisopropyl Azodicarboxylate Catalyzed by Nitroxyl Radicals. J. Org. Chem. 2012, 76 (6), 3005-3009.
Gefahrenhinweise (EU): H315-H319-H335
Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.
Avoid breathing dust/fume/gas/mist/vapours/spray. Wear protective gloves and eye/face protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.