Chem. J. Chinese Universities ›› 2012, Vol. 33 ›› Issue (03): 507.doi: 10.3969/j.issn.0251-0790.2012.03.014

• Organic Chemistry • Previous Articles     Next Articles

LiNH2SO3 Promoted Synthesis of 1,8-Dioxo-octahydroxanthene Under Solvent-free Conditions

WANG Zhao-Shen2, LIU Chen-Jiang1,2   

  1. 1. Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education, Physical and Chemical Testing Center, Xinjiang University, Urumqi 830046, China;
    2. Urumqi Key Laboratory of Green Catalysis and Synthesis Technology, School of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China
  • Received:2011-04-25 Online:2012-03-10 Published:2012-03-10

Abstract:

An efficient synthesis of 9-aryl-1,2,3,4,5,6,7,8-octahydroxanthene-1,8-dione via condensation of aromatic aldehydes with 5,5-dimethyl-1,3-cyclohexanedione or cyclohexane-1,3-dione using LiNH2SO3 as an eco-friendly catalyst under solvent-free condition was described. The results indicate that the yields is up to 90% when using 3%(molar fraction) LiNH2SO3 and reacting at 120 ℃ for 40—70 min. Furthermore, a proposed reaction mechanism for the reaction catalyzed by LiNH2SO3 was speculated. The present methodology offers several advantages such as excellent yields, simple procedure, short reaction time and mild conditions making it an important supplement to the existing methods.

Key words: LiNH2SO3, Solvent-free, Aldehydes, Cyclohexane-1,3-dione, 9-Aryl-1,2,3,4,5,6,7,8-octahydroxanthene-1,8-dione

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