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Results: 1-15 |
Results: 15
A new synthetic access to N-alkylated nitrones through Lewis acid-catalyzed conjugate additions of aldoximes
Authors: Nakama, K Seki, S Kanemasa, S
Citation: K. Nakama et al., A new synthetic access to N-alkylated nitrones through Lewis acid-catalyzed conjugate additions of aldoximes, TETRAHEDR L, 42(38), 2001, pp. 6719-6722
Ab initio study of Lewis acid catalyzed nitrone cycloaddition to electron deficient alkenes. Does a Lewis acid catalyst change the reaction mechanism?
Authors: Tanaka, J Kanemasa, S
Citation: J. Tanaka et S. Kanemasa, Ab initio study of Lewis acid catalyzed nitrone cycloaddition to electron deficient alkenes. Does a Lewis acid catalyst change the reaction mechanism?, TETRAHEDRON, 57(5), 2001, pp. 899-905
Stereo- and regio-control of 1,3-dipolar cycloaddition reactions by the aid of Lewis acid catalysts - Nitrone and aci-nitro compound cycloadditions
Authors: Kanemasa, S
Citation: S. Kanemasa, Stereo- and regio-control of 1,3-dipolar cycloaddition reactions by the aid of Lewis acid catalysts - Nitrone and aci-nitro compound cycloadditions, NIP KAG KAI, (3), 2000, pp. 155-165
Metal ion-mediated diastereoface-selective 1,3-dipolar cycloaddition of nitrile oxides with dipolarophiles bearing an oxazolidinone chiral auxiliary
Authors: Yamamoto, H Watanabe, S Kadotani, K Hasegawa, M Noguchi, M Kanemasa, S
Citation: H. Yamamoto et al., Metal ion-mediated diastereoface-selective 1,3-dipolar cycloaddition of nitrile oxides with dipolarophiles bearing an oxazolidinone chiral auxiliary, TETRAHEDR L, 41(17), 2000, pp. 3131-3136
A novel tandem transetherification-intramolecular hetero Diels-Alder reactions for construction of fused heterocycles
Authors: Wada, E Kumaran, G Kanemasa, S
Citation: E. Wada et al., A novel tandem transetherification-intramolecular hetero Diels-Alder reactions for construction of fused heterocycles, TETRAHEDR L, 41(1), 2000, pp. 73-76
Synthesis of hydroximoyl chlorides from aldoximes and benzyltrimethylammonium tetrachloroiodate (BTMA ICl4)
Authors: Kanemasa, S Matsuda, H Kamimura, A Kakinami, T
Citation: S. Kanemasa et al., Synthesis of hydroximoyl chlorides from aldoximes and benzyltrimethylammonium tetrachloroiodate (BTMA ICl4), TETRAHEDRON, 56(8), 2000, pp. 1057-1064
An ab initio molecular orbital study on the magnesium controlled 1,3-cycloaddition of nitrile oxides and allylic alcohols with regio- and stereoselectivity
Authors: Fukuda, S Kamimura, A Kanemasa, S Hori, K
Citation: S. Fukuda et al., An ab initio molecular orbital study on the magnesium controlled 1,3-cycloaddition of nitrile oxides and allylic alcohols with regio- and stereoselectivity, TETRAHEDRON, 56(12), 2000, pp. 1637-1647
Bisoxazoline and bioxazoline chiral ligands bearing 4-diphenylmethyl shielding substituents. Diels-Alder reaction of cyclopentadiene with 3-acryloyl-2-oxazolidinone catalyzed by the aqua nickel(II) complex
Authors: Kanemasa, S Adachi, K Yamamoto, H Wada, E
Citation: S. Kanemasa et al., Bisoxazoline and bioxazoline chiral ligands bearing 4-diphenylmethyl shielding substituents. Diels-Alder reaction of cyclopentadiene with 3-acryloyl-2-oxazolidinone catalyzed by the aqua nickel(II) complex, B CHEM S J, 73(3), 2000, pp. 681-687
Lewis acid-catalyzed enantioselective 1,3-dipolar cycloadditions of diazoalkane: Chiral ligand/achiral auxiliary cooperative chirality control
Authors: Kanemasa, S Kanai, T
Citation: S. Kanemasa et T. Kanai, Lewis acid-catalyzed enantioselective 1,3-dipolar cycloadditions of diazoalkane: Chiral ligand/achiral auxiliary cooperative chirality control, J AM CHEM S, 122(43), 2000, pp. 10710-10711
Enantioselective conjugate radical addition reactions mediated by chiral Lewis acid complexes of (R,R)-4,6-dibenzofurandiyl-2,2 '-bis(4-phenyloxazoline) (DBFOX/Ph)
Authors: Iserloh, U Curran, DP Kanemasa, S
Citation: U. Iserloh et al., Enantioselective conjugate radical addition reactions mediated by chiral Lewis acid complexes of (R,R)-4,6-dibenzofurandiyl-2,2 '-bis(4-phenyloxazoline) (DBFOX/Ph), TETRAHEDR-A, 10(12), 1999, pp. 2417-2428
Lewis acid-catalyzed reactions of ethyl diazoacetate with aldehydes. Synthesis of alpha-formyl esters by a sequence of aldol reaction and 1,2-nucleophilic rearrangement
Authors: Kanemasa, S Kanai, T Araki, T Wada, E
Citation: S. Kanemasa et al., Lewis acid-catalyzed reactions of ethyl diazoacetate with aldehydes. Synthesis of alpha-formyl esters by a sequence of aldol reaction and 1,2-nucleophilic rearrangement, TETRAHEDR L, 40(27), 1999, pp. 5055-5058
Fluoride-catalyzed aldol reaction of ethyl trimethylsilyldiazoacetate withaldehydes leading to ethyl alpha-diazo-beta-hydroxy esters and rhodium catalyzed decarboxylative rearrangement of diazo urethanes leading to beta-amino acrylates
Authors: Kanemasa, S Araki, T Kanai, T Wada, E
Citation: S. Kanemasa et al., Fluoride-catalyzed aldol reaction of ethyl trimethylsilyldiazoacetate withaldehydes leading to ethyl alpha-diazo-beta-hydroxy esters and rhodium catalyzed decarboxylative rearrangement of diazo urethanes leading to beta-amino acrylates, TETRAHEDR L, 40(27), 1999, pp. 5059-5062
Enantioselective preparation of 3,4,5-trisubstituted-4,5-dihydroisoxazolesand 4-substituted-5,6-dihydro-4H[1,2]-oxazines by nitrile oxide cycloaddition to alpha-silyl allyl alcohols
Authors: Kamimura, A Kaneko, Y Ohta, A Kakehi, A Matsuda, H Kanemasa, S
Citation: A. Kamimura et al., Enantioselective preparation of 3,4,5-trisubstituted-4,5-dihydroisoxazolesand 4-substituted-5,6-dihydro-4H[1,2]-oxazines by nitrile oxide cycloaddition to alpha-silyl allyl alcohols, TETRAHEDR L, 40(23), 1999, pp. 4349-4352
Asymmetric conjugate addition of thiols to a 3-(2-alkenoyl)-2-oxazolidinone catalyzed by the DBFOX/Ph aqua complex of nickel(II) perchlorate
Authors: Kanemasa, S Oderaotoshi, Y Wada, E
Citation: S. Kanemasa et al., Asymmetric conjugate addition of thiols to a 3-(2-alkenoyl)-2-oxazolidinone catalyzed by the DBFOX/Ph aqua complex of nickel(II) perchlorate, J AM CHEM S, 121(37), 1999, pp. 8675-8676
Highly endo- and enantioselective asymmetric nitrone cycloadditions catalyzed by the aqua complex of 4,6-dibenzofurandiyl-2,2 '-bis (4-phenyl-oxazoline)-nickel(II) perchlorate. Transition structure based on dramatic effect of MS 4A on selectivities
Authors: Kanemasa, S Oderaotoshi, Y Tanaka, J Wada, E
Citation: S. Kanemasa et al., Highly endo- and enantioselective asymmetric nitrone cycloadditions catalyzed by the aqua complex of 4,6-dibenzofurandiyl-2,2 '-bis (4-phenyl-oxazoline)-nickel(II) perchlorate. Transition structure based on dramatic effect of MS 4A on selectivities, J AM CHEM S, 120(47), 1998, pp. 12355-12356
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