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Volume 33, Issue 4
Displaying 1-8 of 8 articles from this issue
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Tadahiro KATO, Satoru KUMAZAWA1975 Volume 33 Issue 4 Pages 223-238
Published: April 01, 1975
Released on J-STAGE: November 13, 2009
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Takashi OISHI1975 Volume 33 Issue 4 Pages 239-255
Published: April 01, 1975
Released on J-STAGE: November 13, 2009
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Syntheses of Isoprenoids and Related Compounds by Use of EnzymeKyozo OGURA1975 Volume 33 Issue 4 Pages 256-269
Published: April 01, 1975
Released on J-STAGE: November 13, 2009
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Reaction of Azoxybenzene derivatives and Trichloroacetic acidJiro YAMAMOTO, Noriaki SATO, Mathuo KOSHIKAWA, Yoichiro ISODA, Masahir ...1975 Volume 33 Issue 4 Pages 270-273
Published: April 01, 1975
Released on J-STAGE: January 22, 2010
JOURNAL FREE ACCESSIt was reported in a previous paper that azoxybenzene undergoes the wallach rearrangement with trichloroacetic acid catalyst in boiling acetic anhydride. This method was applied to various azoxy compounds. (1) 2, 2- and 4, 4- Dimethyl azoxybenzenes gave 4- and 2-hydroxyazo compounds respectively in good yields. (2) The yield of o-hydroxyazo compounds was higher than that of p-hydroxyazo compounds in both cases of α-p-methyl and α-p-methoxy azoxybenzene. (3) No reaction occurred with β-p-nitro azoxybenzene (4) Dichloro and monochloroacetic acids were found to be also effective for the rearrangement of 2, 2'-dimethyl azoxybenzene, although in less yield.View full abstractDownload PDF (654K) -
Jan Ho Li, Nobuyuki GOTOH1975 Volume 33 Issue 4 Pages 274-276
Published: April 01, 1975
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSBy unsymmetrical Ullmann reaction of 3-iodobenzanthrone (1) and 3, 9-diiodobenzanthrone (2), new unsymmetrical benzanthrone trimer (5) was obtained in 16% yield, as yellow crystals. 3- (3-Benzanthronyl) violanthrone (7) was obtained in quantitative yield by alkali condensation of (5).
3, 9'-Dibenzanthronyl (6) was obtained from (2) and 9-iodobenzanthrone (3) in 7% yield by the same procedure.View full abstractDownload PDF (343K) -
Yoshito ABE, Pei-Chin HSU1975 Volume 33 Issue 4 Pages 277-278
Published: April 01, 1975
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSPyrene (5g), dissolved in nitrobenzene (1020ml), was stirred with conc. sulfuric acid (4ml; 3 times theoretical) for 1 hour at 4050°C. 1-Pyrenesulfonic acid thus formed was filtered off and washed with benzene and then with conc. hydrochloric acid. The yield of the crude acid was almost theoretical.
The acid monohydrate (mp 118119°C) and the anhydrous acid (mp 182184°C [with decompn.]) was obtained by reprecipitation from aqueous solution with conc. hydrochloric acid and by recrystallization from methylene chloride, respectively.View full abstractDownload PDF (287K) -
Sadanari YAMAKAMI1975 Volume 33 Issue 4 Pages 279-282
Published: April 01, 1975
Released on J-STAGE: November 13, 2009
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Tatsuo NISHIOKA, Sadao KOBAYASHI1975 Volume 33 Issue 4 Pages 283-286
Published: April 01, 1975
Released on J-STAGE: November 13, 2009
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