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Results: 1-25 | 26-30
Results: 1-25/30
STABILITY OF ELECTRON-DEFICIENT ACTIVATED NITRONATES UNDER NEUTRAL AND LEWIS-ACID CATALYZED CONDITIONS - FACILE NITRONATE CYCLOADDITION REACTIONS TO THE MAGNESIUM ALKOXIDES OF ALLYLIC ALCOHOLS LEADING TO ISOXAZOLIDINES AND ISOXAZOLINES
Authors: KANEMASA S KAGA S WADA E
Citation: S. Kanemasa et al., STABILITY OF ELECTRON-DEFICIENT ACTIVATED NITRONATES UNDER NEUTRAL AND LEWIS-ACID CATALYZED CONDITIONS - FACILE NITRONATE CYCLOADDITION REACTIONS TO THE MAGNESIUM ALKOXIDES OF ALLYLIC ALCOHOLS LEADING TO ISOXAZOLIDINES AND ISOXAZOLINES, Tetrahedron letters, 39(48), 1998, pp. 8865-8868
CYCLOADDITION RING OPENING OF 3-UNSUBSTITUTED CYCLIC NITRONATES, ISOXAZOLINE AND 5,6-DIHYDRO-4H-1,2-OXAZINE N-OXIDES, AS SYNTHETIC EQUIVALENTS OF FUNCTIONALIZED NITRILE OXIDES/
Authors: KANEMASA S YOSHIMIYA T WADA E
Citation: S. Kanemasa et al., CYCLOADDITION RING OPENING OF 3-UNSUBSTITUTED CYCLIC NITRONATES, ISOXAZOLINE AND 5,6-DIHYDRO-4H-1,2-OXAZINE N-OXIDES, AS SYNTHETIC EQUIVALENTS OF FUNCTIONALIZED NITRILE OXIDES/, Tetrahedron letters, 39(48), 1998, pp. 8869-8872
TEMPERATURE-DEPENDENT H-1-NMR STUDY OF THE SUBSTRATE COMPLEX DERIVED FROM ZINC(II) PERCHLORATE, -4,6-DIBENZOFURANDIYL-2,2'-BIS(4-PHENYLOXAZOLINE), AND 3-ACETYL-2-OXAZOLIDINONE - EVIDENCE FOR OCTAHEDRAL STRUCTURE OF THE SUBSTRATE COMPLEX
Authors: KANEMASA S ODERAOTOSHI Y TANAKA J WADA E
Citation: S. Kanemasa et al., TEMPERATURE-DEPENDENT H-1-NMR STUDY OF THE SUBSTRATE COMPLEX DERIVED FROM ZINC(II) PERCHLORATE, -4,6-DIBENZOFURANDIYL-2,2'-BIS(4-PHENYLOXAZOLINE), AND 3-ACETYL-2-OXAZOLIDINONE - EVIDENCE FOR OCTAHEDRAL STRUCTURE OF THE SUBSTRATE COMPLEX, Tetrahedron letters, 39(41), 1998, pp. 7521-7524
IMPROVED GENERATION METHOD FOR FUNCTIONALIZED NITRILE OXIDE
Authors: NISHIWAKI N UEHARA T ASAKA N TOHDA Y ARIGA M KANEMASA S
Citation: N. Nishiwaki et al., IMPROVED GENERATION METHOD FOR FUNCTIONALIZED NITRILE OXIDE, Tetrahedron letters, 39(27), 1998, pp. 4851-4852
ASYMMETRIC CYCLOADDITION REACTIONS CATALY ZED BY TRANSITION-METAL COMPLEXES - NEW GUIDELINES FOR STRUCTURAL DESIGN OF CHIRAL CATALYST
Authors: KANEMASA S ODERAOTOSHI Y
Citation: S. Kanemasa et Y. Oderaotoshi, ASYMMETRIC CYCLOADDITION REACTIONS CATALY ZED BY TRANSITION-METAL COMPLEXES - NEW GUIDELINES FOR STRUCTURAL DESIGN OF CHIRAL CATALYST, Yuki Gosei Kagaku Kyokaishi, 56(5), 1998, pp. 368-376
TRANSITION-METAL AQUA COMPLEXES OF 4,6-DIBENZOFURANDIYL-2,2'-BIS(4-PHENYLOXAZOLINE) - EFFECTIVE CATALYSIS IN DIELS-ALDER REACTIONS SHOWING EXCELLENT ENANTIOSELECTIVITY, EXTREME CHIRAL AMPLIFICATION, AND HIGH TOLERANCE TO WATER, ALCOHOLS, AMINES, AND ACIDS
Authors: KANEMASA S ODERAOTOSHI Y SAKAGUCHI S YAMAMOTO H TANAKA J WADA E CURRAN DP
Citation: S. Kanemasa et al., TRANSITION-METAL AQUA COMPLEXES OF 4,6-DIBENZOFURANDIYL-2,2'-BIS(4-PHENYLOXAZOLINE) - EFFECTIVE CATALYSIS IN DIELS-ALDER REACTIONS SHOWING EXCELLENT ENANTIOSELECTIVITY, EXTREME CHIRAL AMPLIFICATION, AND HIGH TOLERANCE TO WATER, ALCOHOLS, AMINES, AND ACIDS, Journal of the American Chemical Society, 120(13), 1998, pp. 3074-3088
CATALYTIC EFFICIENCY, LIGAND ACCELERATION, AND CONCENTRATION-EFFECT IN MAGNESIUM-ION MEDIATED 1,3-DIPOLAR CYCLOADDITIONS OF MESITONITRILE OXIDE TO ALLYLIC ALCOHOLS
Authors: KANEMASA S OKUDA K YAMAMOTO H KAGA S
Citation: S. Kanemasa et al., CATALYTIC EFFICIENCY, LIGAND ACCELERATION, AND CONCENTRATION-EFFECT IN MAGNESIUM-ION MEDIATED 1,3-DIPOLAR CYCLOADDITIONS OF MESITONITRILE OXIDE TO ALLYLIC ALCOHOLS, Tetrahedron letters, 38(23), 1997, pp. 4095-4098
CATIONIC AQUA COMPLEXES OF THE C-2-SYMMETRICAL TRANS-CHELATING LIGAND)-4,6-DIBENZOFURANDIYL-2,2'-BIS(4-PHENYLOXAZOLINE) - ABSOLUTE CHIRAL INDUCTION IN DIELS-ALDER REACTIONS CATALYZED BY WATER-TOLERANT ENANTIOPURE LEWIS-ACIDS
Authors: KANEMASA S ODERAOTOSHI Y YAMAMOTO H TANAKA J WADA E CURRAN DP
Citation: S. Kanemasa et al., CATIONIC AQUA COMPLEXES OF THE C-2-SYMMETRICAL TRANS-CHELATING LIGAND)-4,6-DIBENZOFURANDIYL-2,2'-BIS(4-PHENYLOXAZOLINE) - ABSOLUTE CHIRAL INDUCTION IN DIELS-ALDER REACTIONS CATALYZED BY WATER-TOLERANT ENANTIOPURE LEWIS-ACIDS, Journal of organic chemistry, 62(19), 1997, pp. 6454-6455
SYNTHESIS OF PURE ENANTIOMERS OF A NEW DIOL LIGAND, ,5-BIS(2-HYDROXYPHENYL)-2,2-DIMETHYL-1,3-DIOXOLANE
Authors: YAMAMOTO H KOBAYASHI S KANEMASA S
Citation: H. Yamamoto et al., SYNTHESIS OF PURE ENANTIOMERS OF A NEW DIOL LIGAND, ,5-BIS(2-HYDROXYPHENYL)-2,2-DIMETHYL-1,3-DIOXOLANE, Tetrahedron : asymmetry, 7(1), 1996, pp. 149-155
DL-SELECTIVE REDUCTIVE COUPLING DIECKMANN CONDENSATION SEQUENCE OF ALPHA,BETA-UNSATURATED AMIDES WITH SAMARIUM(II) IODIDE HMPA - SYNTHESIS OF A NEW LIGAND, TRANS-1,2-CYCLOPENTANEDIYL-2,2'-BIPHENOL
Authors: KANEMASA S YAMAMOTO H KOBAYASHI S
Citation: S. Kanemasa et al., DL-SELECTIVE REDUCTIVE COUPLING DIECKMANN CONDENSATION SEQUENCE OF ALPHA,BETA-UNSATURATED AMIDES WITH SAMARIUM(II) IODIDE HMPA - SYNTHESIS OF A NEW LIGAND, TRANS-1,2-CYCLOPENTANEDIYL-2,2'-BIPHENOL, Tetrahedron letters, 37(47), 1996, pp. 8505-8506
EXCLUSIVELY ENDO-SELECTIVE LEWIS ACID-CATALYZED HETERO DIEIS-ALDER REACTIONS OF (E)-1-PHENYLSULFONYL-3-ALKEN-2-ONES WITH VINYL ETHERS
Authors: WADA E PEI W YASUOKA H CHIN U KANEMASA S
Citation: E. Wada et al., EXCLUSIVELY ENDO-SELECTIVE LEWIS ACID-CATALYZED HETERO DIEIS-ALDER REACTIONS OF (E)-1-PHENYLSULFONYL-3-ALKEN-2-ONES WITH VINYL ETHERS, Tetrahedron, 52(4), 1996, pp. 1205-1220
MAGNESIUM BROMIDE-PROMOTED E Z-ISOMERIZATION OF CARBONYL-CONJUGATED NITRONES AND HIGHLY STEREOSELECTIVE AND REGIOSELECTIVE CYCLOADDITIONS TO ALLYLIC ALCOHOL DIPOLAROPHILES/
Authors: KANEMASA S TSURUOKA T
Citation: S. Kanemasa et T. Tsuruoka, MAGNESIUM BROMIDE-PROMOTED E Z-ISOMERIZATION OF CARBONYL-CONJUGATED NITRONES AND HIGHLY STEREOSELECTIVE AND REGIOSELECTIVE CYCLOADDITIONS TO ALLYLIC ALCOHOL DIPOLAROPHILES/, Chemistry Letters, (1), 1995, pp. 49-50
METAL ION-MEDIATED DIASTEREOFACE-SELECTIVE NITRONE CYCLOADDITIONS - REACTION-MECHANISM FOR THE REVERSAL OF REGIOSELECTIVITY OBSERVED IN THEMAGNESIUM AND ZINC ION-MEDIATED NITRONE CYCLOADDITIONS OF ALLYLIC ALCOHOLS
Authors: KANEMASA S TSURUOKA T YAMAMOTO H
Citation: S. Kanemasa et al., METAL ION-MEDIATED DIASTEREOFACE-SELECTIVE NITRONE CYCLOADDITIONS - REACTION-MECHANISM FOR THE REVERSAL OF REGIOSELECTIVITY OBSERVED IN THEMAGNESIUM AND ZINC ION-MEDIATED NITRONE CYCLOADDITIONS OF ALLYLIC ALCOHOLS, Tetrahedron letters, 36(28), 1995, pp. 5019-5022
CHIRALITY CONTROL BY THE AID OF 2,2-DIMETHYLOXAZOLIDINE CHIRAL AUXILIARIES - HIGHLY 1,4-CHIRAL INDUCTIVE ASYMMETRIC ALKYLATIONS OF AMIDE ENOLATES
Authors: KANEMASA S UENO K ONIMURA K KIKUKAWA T YAMAMOTO H
Citation: S. Kanemasa et al., CHIRALITY CONTROL BY THE AID OF 2,2-DIMETHYLOXAZOLIDINE CHIRAL AUXILIARIES - HIGHLY 1,4-CHIRAL INDUCTIVE ASYMMETRIC ALKYLATIONS OF AMIDE ENOLATES, Tetrahedron, 51(38), 1995, pp. 10453-10462
HIGH ENANTIOCONTROL OF MICHAEL ADDITIONS BY USE OF 2,2-DIMETHYLOXAZOLIDINE CHIRAL AUXILIARIES - EXCLUSIVELY UL,LK-1,4-INDUCTIVE MICHAEL ADDITIONS OF THE LITHIUM (Z)-ENOLATE OF BENZYL-2,2,5,5-TETRAMETHYL-3-PROPANOYL-OXAZOLIDINE TO ALPHA,BETA-UNSATURATED ESTERS
Authors: KANEMASA S NOMURA M YOSHINAGA S YAMAMOTO H
Citation: S. Kanemasa et al., HIGH ENANTIOCONTROL OF MICHAEL ADDITIONS BY USE OF 2,2-DIMETHYLOXAZOLIDINE CHIRAL AUXILIARIES - EXCLUSIVELY UL,LK-1,4-INDUCTIVE MICHAEL ADDITIONS OF THE LITHIUM (Z)-ENOLATE OF BENZYL-2,2,5,5-TETRAMETHYL-3-PROPANOYL-OXAZOLIDINE TO ALPHA,BETA-UNSATURATED ESTERS, Tetrahedron, 51(38), 1995, pp. 10463-10476
INTERACTIONS BETWEEN 1,3-DIPOLES AND META L-IONS - STEREOCONTROL AND REGIOCONTROL OF 1,3-DIPOLAR CYCLOADDITION REACTIONS
Authors: KANEMASA S
Citation: S. Kanemasa, INTERACTIONS BETWEEN 1,3-DIPOLES AND META L-IONS - STEREOCONTROL AND REGIOCONTROL OF 1,3-DIPOLAR CYCLOADDITION REACTIONS, Yuki Gosei Kagaku Kyokaishi, 53(2), 1995, pp. 104-115
CHIRAL LEWIS ACID-CATALYZED ASYMMETRIC HETERO-DIELS-ALDER REACTION OF(E)-2-OXO-1-PHENYLSULFONYL-3-ALKENES WITH VINYL ETHERS
Authors: WADA E YASUOKA H KANEMASA S
Citation: E. Wada et al., CHIRAL LEWIS ACID-CATALYZED ASYMMETRIC HETERO-DIELS-ALDER REACTION OF(E)-2-OXO-1-PHENYLSULFONYL-3-ALKENES WITH VINYL ETHERS, Chemistry Letters, (9), 1994, pp. 1637-1640
CHIRAL LEWIS ACID-CATALYZED ASYMMETRIC DIELS-ALDER REACTIONS OF (E)-1-PHENYLSULFONYL-3-ALKEN-2-ONES WITH CYCLOPENTADIENE
Authors: WADA E PEI W KANEMASA S
Citation: E. Wada et al., CHIRAL LEWIS ACID-CATALYZED ASYMMETRIC DIELS-ALDER REACTIONS OF (E)-1-PHENYLSULFONYL-3-ALKEN-2-ONES WITH CYCLOPENTADIENE, Chemistry Letters, (12), 1994, pp. 2345-2348
(E)-2-OXO-1-SULFONYL-3-ALKENES AS REACTIVE HETERO 1,3-DIENES - ABSOLUTELY ENDO-SELECTIVE HETERO-DIELS-ALDER REACTIONS WITH VINYL ETHERS IN THE PRESENCE OF A LEWIS-ACID CATALYST
Authors: WADA E YASUOKA H KANEMASA S
Citation: E. Wada et al., (E)-2-OXO-1-SULFONYL-3-ALKENES AS REACTIVE HETERO 1,3-DIENES - ABSOLUTELY ENDO-SELECTIVE HETERO-DIELS-ALDER REACTIONS WITH VINYL ETHERS IN THE PRESENCE OF A LEWIS-ACID CATALYST, Chemistry Letters, (1), 1994, pp. 145-148
SEMIEMPIRICAL MOLECULAR-ORBITAL STUDY ON THE TRANSITION-STATES FOR THE ANTI-SELECTIVE MICHAEL ADDITION-REACTIONS OF THE LITHIUM Z-ENOLATES OF N-ALKYLIDENEGLYCINATES TO ALPHA,BETA-UNSATURATED ESTERS
Authors: TATSUKAWA A KAWATAKE K KANEMASA S RUDZINSKI JM
Citation: A. Tatsukawa et al., SEMIEMPIRICAL MOLECULAR-ORBITAL STUDY ON THE TRANSITION-STATES FOR THE ANTI-SELECTIVE MICHAEL ADDITION-REACTIONS OF THE LITHIUM Z-ENOLATES OF N-ALKYLIDENEGLYCINATES TO ALPHA,BETA-UNSATURATED ESTERS, Perkin transactions. 2, (12), 1994, pp. 2525-2530
C-2-SYMMETRICAL 1,2-DIAMINE COPPER(II) TRIFLUOROMETHANESULFONATE COMPLEXES AS CHIRAL CATALYSTS - ASYMMETRIC CYCLOPROPANATIONS OF STYRENE WITH DIAZO ESTERS/
Authors: KANEMASA S HAMURA S HATADA E YAMAMOTO H
Citation: S. Kanemasa et al., C-2-SYMMETRICAL 1,2-DIAMINE COPPER(II) TRIFLUOROMETHANESULFONATE COMPLEXES AS CHIRAL CATALYSTS - ASYMMETRIC CYCLOPROPANATIONS OF STYRENE WITH DIAZO ESTERS/, Tetrahedron letters, 35(43), 1994, pp. 7985-7988
C-2-SYMMETRICAL 1,2-DIAMINE COPPER(II) TRIFLUOROMETHANESULFONATE COMPLEXES AS CHIRAL CATALYSTS - ASYMMETRIC CYCLOPROPANATIONS OF STYRENE WITH DIAZO ESTERS/
Authors: KANEMASA S HAMURA S HATADA E YAMAMOTO H
Citation: S. Kanemasa et al., C-2-SYMMETRICAL 1,2-DIAMINE COPPER(II) TRIFLUOROMETHANESULFONATE COMPLEXES AS CHIRAL CATALYSTS - ASYMMETRIC CYCLOPROPANATIONS OF STYRENE WITH DIAZO ESTERS/, Tetrahedron letters, 35(43), 1994, pp. 7985-7988
MICHAEL ADDITIONS OF THE LITHIUM ENOLATES OF ALPHA-HETEROSUBSTITUTED ESTERS AND AMIDES TO A CHIRAL ALPHA,BETA-UNSATURATED CARBONYL ACCEPTOR, ETHYL )-3-[(S)-2,2-DIMETHYL-1,3-DIOXOLAN-4-YL]PROPENOATE - HIGH STEREOSELECTION AND CHIRAL INDUCTION
Authors: NOMURA M KANEMASA S
Citation: M. Nomura et S. Kanemasa, MICHAEL ADDITIONS OF THE LITHIUM ENOLATES OF ALPHA-HETEROSUBSTITUTED ESTERS AND AMIDES TO A CHIRAL ALPHA,BETA-UNSATURATED CARBONYL ACCEPTOR, ETHYL )-3-[(S)-2,2-DIMETHYL-1,3-DIOXOLAN-4-YL]PROPENOATE - HIGH STEREOSELECTION AND CHIRAL INDUCTION, Tetrahedron letters, 35(1), 1994, pp. 143-146
EFFECTIVE ENANTIOCONTROL IN CONJUGATE ADDITIONS OF ORGANOCUPRATES - HIGHLY SELECTIVE 1,5-CHIRAL INDUCTION IN THE CONJUGATE ADDITIONS OF CUPRATES TO OR ALPHA,BETA-UNSATURATED AMIDE DERIVATIVES OF 2,2-DIMETHYLOXAZOLIDINE CHIRAL AUXILIARIES
Authors: KANEMASA S SUENAGA H ONIMURA K
Citation: S. Kanemasa et al., EFFECTIVE ENANTIOCONTROL IN CONJUGATE ADDITIONS OF ORGANOCUPRATES - HIGHLY SELECTIVE 1,5-CHIRAL INDUCTION IN THE CONJUGATE ADDITIONS OF CUPRATES TO OR ALPHA,BETA-UNSATURATED AMIDE DERIVATIVES OF 2,2-DIMETHYLOXAZOLIDINE CHIRAL AUXILIARIES, Journal of organic chemistry, 59(23), 1994, pp. 6949-6954
1ST SUCCESSFUL METAL COORDINATION CONTROL IN 1,3-DIPOLAR CYCLOADDITIONS - HIGH-RATE ACCELERATION AND REGIOCONTROL AND STEREOCONTROL OF NITRILE OXIDE CYCLOADDITIONS TO THE MAGNESIUM ALKOXIDES OF ALLYLIC AND HOMOALLYLIC ALCOHOLS
Authors: KANEMASA S NISHIUCHI M KAMIMURA A HORI K
Citation: S. Kanemasa et al., 1ST SUCCESSFUL METAL COORDINATION CONTROL IN 1,3-DIPOLAR CYCLOADDITIONS - HIGH-RATE ACCELERATION AND REGIOCONTROL AND STEREOCONTROL OF NITRILE OXIDE CYCLOADDITIONS TO THE MAGNESIUM ALKOXIDES OF ALLYLIC AND HOMOALLYLIC ALCOHOLS, Journal of the American Chemical Society, 116(6), 1994, pp. 2324-2339
Risultati: 1-25 | 26-30