A new and efficient route for 1, 3, 3′-triketones

S Lim, Y Min, B Choi, D Kim, I Yoon, SS Lee, IM Lee

Index: Lim, Sunkwon; Min, Yosep; Choi, Bohyun; Kim, Daesig; Yoon, Il; Lee, Shim Sung; Lee, Ik-Mo Tetrahedron Letters, 2001 , vol. 42, # 43 p. 7645 - 7649

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Citation Number: 14

Abstract

Cyclic and acyclic 1, 3, 3′-triketones were prepared by the reactions adopting β-diketones and anhydrides in the presence of barium or strontium hydrides in high yields. Crystal structure of 4-acetyl-2, 2, 6, 6-tetramethyl-3, 5-heptanedione (3a) represented the dorminant keto form and provided evidence for intermolecular C H⋯ O hydrogen bonds (average C⋯ O distance; 3.437 Å, average C H⋯ O angle; 169.25°).