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Indium(III) chloride is used in famous organic reactions such as Friedel-Crafts acylation and Diels-Alder reaction as a lewis acid catalyst. It is an efficient catalyst for thioacetalization and its chemoselectivity. It catalyzes the enantioselective ring-opening of meso-aziridines with thiols.
Mild, water tolerant Lewis acid catalyst, e.g. in allylation reactions of sensitive aldehydes with allyltributyltin: J. Org Chem., 61, 105 (1996). The allylstannane can also be generated in situ from the allyl halide in water: Tetrahedron Asym., 7, 1535 (1996). Catalyzes the Mukaiyama aldol reaction, under either solvent-free conditions: Tetrahedron Lett., 39, 1579 (1998), or in water: Chem. Commun., 1819 (1996); 861 (1998); Tetrahedron Lett., 38, 3465 (1997). For Diels-Alder reactions in water, see: Chem. Commun., 2315 (1996).
Promotes efficient azidolysis of ɑß-epoxy carboxyl derivatives in water at pH 4, with results superior to Yb(OTf)3 or Sc(OTf)3: J. Org. Chem., 66, 3554 (2001).
In combination with a dithiol, catalyzes the efficient transthioacetalization of acetals to dithioacetals: Synlett, 727 (2002).
Aldoximes can be dehydrated to nitriles; ketoximes undergo the Beckmann rearrangement to amides: Chem. Commun., 1196 (2000).
Indium enolates are readily formed by transmetallation of Li enolates. These undergo Reformatsky-type reactions with aldehydes to give ß-hydroxy esters. ɑ-Bromo enolates give Darzens-type ɑß-epoxy carbonyl compounds: J. Chem. Soc., Perkin 1, 825 (2000).
Catalyst for conjugate addition of indoles to electron-deficient alkenes: Synthesis, 2165 (2001):
The combination with NaBH4 has been reported to be an effective radical reducing system, replacing the environmentally unfavorable TBTH (Tri-n-butyltin hydride, A13298), e.g. in dehalogenation and cyclization reactions: J. Am. Chem. Soc., 124, 906 (2002).
For a brief feature on InCl3, see: Synlett, 531 (2002). For reviews of the use of In compounds in organic synthesis, see: Eur. J. Org. Chem., 2347 (2000); J. Chem. Soc., Perkin 1, 3015 (2000)./n
Onishi, Y.; Nishimoto, Y.; Yasuda, M.; Baba, A. Indium Chloride Catalyzed Alkylative Rearrangement of Propargylic Acetates Using Alkyl Chlorides, Alcohols, and Acetates: Facile Synthesis of alpha-Alkyl-alpha,beta-Unsaturated Carbonyl Compounds. Org. Lett. 2014, 16 (4), 1176-1179.
Akiyama, K.; Yamamoto, K.; Mineno, T.; Okawa, M.; Kinjo, J.; Yoshimitsu, H.; Nohara, T.; Ono, M. Five New Resin Glycoside Derivatives Isolated from the Convolvulin Fraction of Seeds of Quamoclit pennataafter Treatment with Indium(III) Chloride in Methanol. Chem. Pharm. Bull. 2014, 62 (1), 125-133.
Dichiarazioni di rischio (UE): H302-H314-H318
Harmful if swallowed. Causes severe skin burns and eye damage. Causes serious eye damage.
Dichiarazioni precauzionali: P260u-P303+P361+P353-P305+P351+P338-P301+P330+P331-P405-P501a
Do not breathe dusts or mists. IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.