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Volume 33, Issue 6
Displaying 1-7 of 7 articles from this issue
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Hiromu HAYASHI1975Volume 33Issue 6 Pages 451-459
Published: June 01, 1975
Released on J-STAGE: November 13, 2009
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Sachihiko ISOE1975Volume 33Issue 6 Pages 460-477
Published: June 01, 1975
Released on J-STAGE: November 13, 2009
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Takao TOKUMITSU, Takayuki HAYASHI1975Volume 33Issue 6 Pages 478-482
Published: June 01, 1975
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSThe reaction of acyclic α, β-unsaturated β-amino ketones (1) with thiocyanogen was investigated. (1) (R3=H) reacted with thiocyanogen in 1, 2-dichloroethane at 0°C to give corresponding α, β-unsaturated α-thiocyanato-β-amino ketone (2) in 7883% yield. In contrast, the reaction of α, β-unsaturated β-monosu-bstituted amino ketones (1) (substituent R3 : Me and Ph) with thiocyanogen at 025°C gave corresponding cyclization products, 2-imino-3, 4, 5-trisubstituted 4-thiazolines (4) in 4488% yield. The reaction of 3-anilino-3-penten-2-one (1) with thiocyanogen at 30°C for 5 hours gave (4c) (41%yield) and 5-acetyl-2-anilino-4-methylthiazole (5) (30% yield), which was the isomerization product of (4c). (4) and 2-amino-4, 5-disubstituted thiazoles (3) were obtained also by cyclization of (2) by heat, acid and alkali in 83100% yield. The structure of (2) was also discussed.View full abstractDownload PDF (808K) -
Studies on Syntheses and Reactions of α, α-Disubstituted Amino Acids (2)Hiroyoshi AKASHI1975Volume 33Issue 6 Pages 483-485
Published: June 01, 1975
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSThe reaction of methyl iodide and allyl-type halides with 2-phenyl-5-oxazolone was carried out in dimethylformamide by use of 50% aqueous solution of potassium hydroxide or triethylamine as a base. When triethylamine was used, better yield was obtained. From methyl iodide, α-benzamino-isobutyric acid was obtained in 49% yield. From allyl halides, disubstituted derivatives (α-benzamino-α, α-diallylacetic acid) were obtained in good yields. Disubstituted derivatives were obtained in good yields (67% or 59%) by the reaction of crotyl bromide or cinnamyl bromide.View full abstractDownload PDF (423K) -
Tadashi NOZAKI, Tatsuo IDO1975Volume 33Issue 6 Pages 486-491
Published: June 01, 1975
Released on J-STAGE: November 13, 2009
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Tatsuo MOROE, Michiaki KAWASAKI1975Volume 33Issue 6 Pages 492-495
Published: June 01, 1975
Released on J-STAGE: November 13, 2009
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[in Japanese], [in Japanese]1975Volume 33Issue 6 Pages 496-497
Published: June 01, 1975
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSDownload PDF (249K)
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