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Title: The reaction of aromatic aldehydes and 5,5-dimethyl-1,3-cyclohexanedione under solvent-free grinding conditions
Authors: Jin, Tong-Shou
Wang, Ai-Qing
Ma, Hui
Zhang, Jian-She
Li, Tong-Shuang
Keywords: aromatic aldehydes
2,2′-arylmethylene bis(3-hydroxy-5,5-dimethyl-2-cyclohexen-1-one)
1, 8-dioxooctahydroxanthene
Issue Date: Feb-2006
Publisher: CSIR
Series/Report no.: <b>Int.Cl.<sup>7</sup> C 07 D</b>
Abstract: The reaction of aromatic aldehyde <b style="">1</b> and 5,5-dimethyl-1,3-cyclohexanedione <b style="">2</b> under solvent-free and solid state conditions has been catalyzed by KF/Al<sub>2</sub>O<sub>3</sub> or silica sulfate and yields two products: 2,2′-arylmethylene bis(3-hydroxy-5,5- dimethyl-2-cyclohexen-1-one) <b style="">3</b> and 1, 8-dioxooctahydroxanthene<b style=""> 4</b> and their derivatives. In addition, 2-amino-4-aryl-3-cyano-7,7-dimethyl-5-oxo-4<i>H</i>-5,6,7,8-tetrahydrobenzo[<i style="">b</i>]pyran <b style="">5</b> is also obtained in this condition. This method provides several advantages such as good yield (61-93%), simple work-up procedure and is environment friendly.
Description: 470-474
ISSN: 0975-0983(Online); 0376-4699(Print)
Appears in Collections:IJC-B Vol.45B(02) [February 2006]

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