Zobrazeno 1 - 10 of 143 pro vyhledávání: '"Takuzo Hisano"'
1
Cycloaddition behavior of 3,4-diazacyclopentadienone dioxides toward bicyclo[2.2.1]heptadiene derivatives. X-ray analysis of the cycloadduct and reaction pathway
Autor: Kazunobu Harano, Yasuyuki Yoshitake, Masashi Eto, Takuzo Hisano
Publikováno v: Journal of Heterocyclic Chemistry. 30:1557-1564
The cycloaddition behavior of 2,5-disubstituted 3,4-diazacyclopenta- dienone dioxide (1a-c) toward expoxy-naphtalene (2a) and norbornadiene (2b) was investigated. The structures of the products were determined on the basis of the 1 H- and 13 C-nmr sp
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e43a0d52c18ee9d45bd350c21f046721
https://doi.org/10.1002/jhet.5570300618
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3
Molecular structure of the double Diels–Alder cycloadduct of 2-pyrone and cycloocta-1,5-diene. Very close intramolecular H/H contact and some comments
Autor: Masashi Eto, Kazunobu Harano, Takuzo Hisano
Publikováno v: J. Chem. Soc., Perkin Trans. 2. :963-966
The molecular structure of the double Diels–Alder adduct (DDA) of 5-methoxycarbonyl-2-pyrone and 1,5-cyclooctadiene has been clarified by single crystal X-ray analysis on the phenylurethane of the hydroxymethyl derivative obtained from LiAlH4 reduc
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cbcfc96f821e9cdc6b95d0427eedbd82
https://doi.org/10.1039/p29930000963
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4
Cycloaddition Behavior of Cyclopentadienone toward Allylic Alcohols. Formation of Hydrophthalide Derivatives via Internal Addition of Alcohol Group to Bridged Carbonyl of exo (4+2).PI. Cycloadducts
Autor: Tomohiro Oya, Takuzo Hisano, Kazunobu Harano, Masashi Eto
Publikováno v: Chemical and Pharmaceutical Bulletin. 41:97-107
The cycloaddition behavior of 2, 5-bis(methoxycarbonyl)-3, 4-diphenylcyclopentadienone (Ia) toward allylic alcohols(II) was investigated. The exo [4+2]π cycloadducts were transformed into hydrophthalide derivatives via intramolecular addition of the
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::db6db1ac3c9448ba977f3f4fda5ffe43
https://doi.org/10.1248/cpb.41.97
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6
ChemInform Abstract: Pericyclic Reactions of 2-Pyrones with Nonconjugated Dienes. Conformational Analysis of the Double Diels-Alder Adducts by Molecular Mechanics Calculation
Autor: Takuzo Hisano, Kazunobu Harano, Takashi Aoki, Masashi Eto
Publikováno v: ChemInform. 22
Pericyclic reactions of 5-methoxycarbonyl-2-pyrone (Ic) with nonconjugated dienes (IIa-j) were investigated. The diene (Ic) reacted readily with IIa-j to give [4+2]π cycloadducts (IIIa-j) that lost carbon dioxide to afford intramolecular double Diel
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7a05333cb5536ce19b6b124b17840783
https://doi.org/10.1002/chin.199101096
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8
ChemInform Abstract: A Simple One-Pot Synthesis of Hydroisobenzothiophenes via Three-Step Sequential Pericyclic Reactions of Xanthates
Autor: Kikuma Ono, Kazunobu Harano, Mitsuhiro Nishimoto, Takuzo Hisano, Masashi Eto
Publikováno v: ChemInform. 23
Thermolysis of O -(2,4-alkadienyl) S -(2-alkenyl or 2-alkynyl) dithiocarbonates (xanthates) gave the hydroisobenzothiophene derivatives via two sequential [3,3]-sigmatropic rearrangement followed by the intramolecular cycloaddition.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::dab2baceb000b4a860945b2c1fc26928
https://doi.org/10.1002/chin.199212151
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