@article{oai:sucra.repo.nii.ac.jp:00012974,
 author = {Kamiguchi, Satoshi and Nishida, Satoru and Takahashi, Ikuko and 黒川, 秀樹 and Miura, Hiroshi and 千原, 貞次},
 issue = {1-2},
 journal = {JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL},
 month = {},
 note = {http://www.sciencedirect.com/science/journal/13811169 | http://www.sciencedirect.com/science/journal/13811169, When a molecular halide cluster [(Ta6Cl12)C-12(H2O)(4)]-4H(2)O (1)/SiO2 was treated in a helium stream above 200 degrees C, it catalyzed the aldol condensation of acetone with benzaldehyde to yield E-4-phenyl-3-buten-2-one. The bromide cluster of Ta and chloride clusters of Nb, Mo, and W of the same octahedral metal framework also catalyzed the reaction. 3,3-Dimethyl-2-butanone combined with benzaldehyde similarly yielded the corresponding aldol condensation product over 1/SiO2 at 400 degrees C. On the other hand, 3-pentanone combined with benzaldehyde provided indenes such as E- and Z-1-ethylidene-2-methylindene and 2-methyl-3-vinylindene of the same carbon skeletal structure, which would be formed by cyclodehydration of the aldol condensation product, E-2-methyl-1-phenyl-1-penten-3-one. One of the advantages of halide cluster catalysts is thermal stability, and high temperatures above 350 degrees C promoted the cyclodehydration. (c) 2006 Elsevier B.V. All rights reserved., text, application/pdf},
 pages = {117--122},
 title = {Aldol condensation of acyclic ketones with benzaldehyde and subsequent cyclodehydration to form indenes over halide cluster catalysts},
 volume = {255},
 year = {2006},
 yomi = {カミグチ, サトシ and ニシダ, サトル and タカハシ, イクコ and クロカワ, ヒデキ and ミウラ, ヒロシ and チハラ, テイジ}
}