A practical protocol has been developed for the synthesis of 1,8-dioxo-octahydroxanthenes from aromatic aldehydes and 5,5-dimethylcyclohexane-1,3-dione under solvent-free conditions in the presence of wet 2,4,6-trichloro-1,3,5-triazine (TCT, cyanuric chloride). The desired products were obtained in high yields with a simple and environmentally benign procedure.
This feature focuses on a reagent chosen by a postgraduate, highlighting the uses and preparation of the reagent in current research
Methy(trifluoromethyl)dioxirane (TFD): A Powerful and Versatile Oxidant in Organic SynthesisCompiled by Xu-Ye Tao Xu-Ye Tao was born in Shijiazhuang, Hebei Province (P. R. of China). She completed her Bachelor degree ( 2006) in chemistry at Hebei Normal University. Presently she is working as a postgraduate under the supervision of Professor Zhan-Hui Zhang at the same University. Her research interest focuses on the development of new synthetic methodologies for green chemistry.
Xanthene derivatives R 0360Fluoroboric Acid Adsorbed on Silica-Gel-Catalyzed Synthesis of 14-Aryl--14H-dibenzo[a,j]xanthene Derivatives. -The title compounds (III) (25 examples) are easily and efficiently obtained by the one-pot condensation of β-naphthol and various arylaldehydes under mild and solvent-free conditions. The inexpensive catalyst can be easily recovered and reused without loss of its catalytic activity. -(LIU, Y.-H.; TAO, X.-Y.; LEI, L.-Q.; ZHANG*, Z.-H.; Synth. Commun. 39 (2009) 4, 580-589; Coll. Chem. Mater. Sci., Hebei Norm. Univ., Shijiazhuang 050016, Peop. Rep. China; Eng.) -H. Toeppel 31-136
Xanthene derivatives R 0360 2,4,6-Trichloro-1,3,5-triazine-Promoted Synthesis of 1,8-Dioxo-octahydroxanthenes under Solvent-Free Conditions. -The reaction is applied to a variety of aromatic and heteroaromatic aldehydes. The use of wet cyanuric chloride is crucial for full conversion. -(ZHANG*, Z.-H.; TAO, X.-Y.; Aust. J. Chem. 61 (2008) 2, 77-79; Coll. Chem. Mater. Sci., Hebei Norm. Univ., Shijiazhuang 050016, Peop. Rep. China; Eng.) -Y. Steudel 26-138
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