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Results: 1-25 | 26-27
Results: 1-25/27
Stereoselective trans- and cis-dihydroxylations of 2H-pyrranyl and dihydropyridinyl heterocycles synthesized from formal [3+3]-cycloaddition reactions of alpha,beta-unsaturated iminium ions with 1,3-dicarbonyl equivalents
Authors: Zehnder, LR Wei, LL Hsung, RP Cole, KP McLaughlin, MJ Shen, HC Sklenicka, HM Wang, JS Zificsak, CA
Citation: Lr. Zehnder et al., Stereoselective trans- and cis-dihydroxylations of 2H-pyrranyl and dihydropyridinyl heterocycles synthesized from formal [3+3]-cycloaddition reactions of alpha,beta-unsaturated iminium ions with 1,3-dicarbonyl equivalents, ORG LETT, 3(14), 2001, pp. 2141-2144
A novel and highly stereoselective intramolecular formal [3+3] cycloaddition reaction of vinylogous amides tethered with alpha,beta-unsaturated aldehydes: A formal total synthesis of (+)-gephyrotoxin
Authors: Wei, LL Hsung, RP Sklenicka, HM Gerasyuto, AI
Citation: Ll. Wei et al., A novel and highly stereoselective intramolecular formal [3+3] cycloaddition reaction of vinylogous amides tethered with alpha,beta-unsaturated aldehydes: A formal total synthesis of (+)-gephyrotoxin, ANGEW CHEM, 40(8), 2001, pp. 1516
Chiral cycloalkylidene alpha,beta-unsaturated iminium approach to stereoselective formal [3+3] cycloaddition reaction in spiroheterocycle synthesis
Authors: McLaughlin, MJ Shen, HC Hsung, RP
Citation: Mj. Mclaughlin et al., Chiral cycloalkylidene alpha,beta-unsaturated iminium approach to stereoselective formal [3+3] cycloaddition reaction in spiroheterocycle synthesis, TETRAHEDR L, 42(4), 2001, pp. 609-613
An unexpected ring-opening of a 2-pyrone ring at low temperatures. A mild and expeditious synthesis of novel coumarins
Authors: Darwish, OS Granum, KA Tan, Q Hsung, RP
Citation: Os. Darwish et al., An unexpected ring-opening of a 2-pyrone ring at low temperatures. A mild and expeditious synthesis of novel coumarins, TETRAHEDR L, 42(19), 2001, pp. 3283-3286
Recent advances in the chemistry of ynamines and ynamides
Authors: Zificsak, CA Mulder, JA Hsung, RP Rameshkumar, C Wei, LL
Citation: Ca. Zificsak et al., Recent advances in the chemistry of ynamines and ynamides, TETRAHEDRON, 57(36), 2001, pp. 7575-7606
Efficient preparations of novel ynamides and allenamides
Authors: Wei, LL Mulder, JA Xiong, H Zificsak, CA Douglas, CJ Hsung, RP
Citation: Ll. Wei et al., Efficient preparations of novel ynamides and allenamides, TETRAHEDRON, 57(3), 2001, pp. 459-466
Chiral ancillaries in the benzannulations of alkoxy and amino carbene complexes with alkynes
Authors: Hsung, RP Wulff, WD Chamberlin, S Liu, Y Liu, RY Wang, H Quinn, JF Wang, SLB Rheingold, AL
Citation: Rp. Hsung et al., Chiral ancillaries in the benzannulations of alkoxy and amino carbene complexes with alkynes, SYNTHESIS-S, (2), 2001, pp. 200-220
Total syntheses of pyranoquinoline alkaloids: Simulenoline, huajiaosimuline, and (+/-)-7-demethoxyzanthodioline
Authors: McLaughlin, MJ Hsung, RP
Citation: Mj. Mclaughlin et Rp. Hsung, Total syntheses of pyranoquinoline alkaloids: Simulenoline, huajiaosimuline, and (+/-)-7-demethoxyzanthodioline, J ORG CHEM, 66(3), 2001, pp. 1049-1053
The first epoxidations of 1-amidoallenes. A general entry to nitrogen-substituted oxyallyl cations in highly stereoselective [4+3] cycloadditions
Authors: Xiong, H Hsung, RP Berry, CR Rameshkumar, C
Citation: H. Xiong et al., The first epoxidations of 1-amidoallenes. A general entry to nitrogen-substituted oxyallyl cations in highly stereoselective [4+3] cycloadditions, J AM CHEM S, 123(29), 2001, pp. 7174-7175
Simultaneous and stereoselective construction of planar and axial centers of chirality
Authors: Fogel, L Hsung, RP Wulff, WD
Citation: L. Fogel et al., Simultaneous and stereoselective construction of planar and axial centers of chirality, J AM CHEM S, 123(23), 2001, pp. 5580-5581
Highly stereoselective formal [3+3] cycloaddition reactions of chiral vinylogous amides with alpha,beta-unsaturated iminiums
Authors: Sklenicka, HM Hsung, RP Wei, LL McLaughlin, WJ Gerasyuto, AI Degen, SJ
Citation: Hm. Sklenicka et al., Highly stereoselective formal [3+3] cycloaddition reactions of chiral vinylogous amides with alpha,beta-unsaturated iminiums, ORG LETT, 2(8), 2000, pp. 1161-1164
The first regioselective alpha-deprotonation and functionalization of allenamides. An application in intramolecular Pauson-Khand-type cycloadditions
Authors: Xiong, H Hsung, RP Wei, LL Berry, CR Mulder, JA Stockwell, B
Citation: H. Xiong et al., The first regioselective alpha-deprotonation and functionalization of allenamides. An application in intramolecular Pauson-Khand-type cycloadditions, ORG LETT, 2(18), 2000, pp. 2869-2871
A concise stereoselective route to the pentacyclic frameworks of arisugacin A and territrem B
Authors: Zehnder, LR Hsung, RP Wang, JS Golding, GM
Citation: Lr. Zehnder et al., A concise stereoselective route to the pentacyclic frameworks of arisugacin A and territrem B, ANGEW CHEM, 39(21), 2000, pp. 3876
Molecular assemblies on silicon surfaces via Si-O linkages
Authors: Zhu, XY Boiadjiev, V Mulder, JA Hsung, RP Major, RC
Citation: Xy. Zhu et al., Molecular assemblies on silicon surfaces via Si-O linkages, LANGMUIR, 16(17), 2000, pp. 6766-6772
Lewis acid mediated condensation reactions of alpha, beta-unsaturated acids with 4-hydroxy-2-pyrones. A concise structural assignment of Fleischmann's alpha,alpha-bispyrone and Praill's alpha,gamma-bispyrone
Authors: Zehnder, LR Dahl, JW Hsung, RP
Citation: Lr. Zehnder et al., Lewis acid mediated condensation reactions of alpha, beta-unsaturated acids with 4-hydroxy-2-pyrones. A concise structural assignment of Fleischmann's alpha,alpha-bispyrone and Praill's alpha,gamma-bispyrone, TETRAHEDR L, 41(12), 2000, pp. 1901-1905
Lewis acid promoted hetero [2+2] cycloaddition reactions of aldehydes with10-propynyl-9(10H)-acridone. A highly stereoselective synthesis of acrylicacid derivatives and 1,3-dienes using an electron deficient variant of ynamine
Authors: Hsung, RP Zificsak, CA Wei, LL Douglas, CJ Xiong, H Mulder, JA
Citation: Rp. Hsung et al., Lewis acid promoted hetero [2+2] cycloaddition reactions of aldehydes with10-propynyl-9(10H)-acridone. A highly stereoselective synthesis of acrylicacid derivatives and 1,3-dienes using an electron deficient variant of ynamine, ORG LETT, 1(8), 1999, pp. 1237-1240
Formal cycloaddition reactions of vinylogous amides with alpha,beta-unsaturated iminiums. A strategy for constructing piperidinyl heterocycles
Authors: Hsung, RP Wei, LL Sklenicka, HM Douglas, CJ McLaughlin, MJ Mulder, JA Yao, LJ
Citation: Rp. Hsung et al., Formal cycloaddition reactions of vinylogous amides with alpha,beta-unsaturated iminiums. A strategy for constructing piperidinyl heterocycles, ORG LETT, 1(3), 1999, pp. 509-512
First stereoselective inverse demand [4+2] cycloaddition reactions of novel chiral allenamides with heterodienes. Preparation of highly functionalized 5-arylpyranyl heterocycles
Authors: Wei, LL Hsung, RP Xiong, H Mulder, JA Nkansah, NT
Citation: Ll. Wei et al., First stereoselective inverse demand [4+2] cycloaddition reactions of novel chiral allenamides with heterodienes. Preparation of highly functionalized 5-arylpyranyl heterocycles, ORG LETT, 1(13), 1999, pp. 2145-2148
Adhesion, deformation and friction for self-assembled monolayers on Au andSi surfaces
Authors: Kiely, JD Houston, JE Mulder, JA Hsung, RP Zhu, XY
Citation: Jd. Kiely et al., Adhesion, deformation and friction for self-assembled monolayers on Au andSi surfaces, TRIBOL LETT, 7(2-3), 1999, pp. 103-107
Synthesis of dihydroxanthone derivatives and evaluation of their inhibitory activity against acetylcholinesterase: Unique structural analogs of tacrine based on the BCD-ring of arisugacin
Authors: Degen, SJ Mueller, KL Shen, HC Mulder, JA Golding, GM Wei, LL Zificsak, CA Neeno-Eckwall, A Hsung, RP
Citation: Sj. Degen et al., Synthesis of dihydroxanthone derivatives and evaluation of their inhibitory activity against acetylcholinesterase: Unique structural analogs of tacrine based on the BCD-ring of arisugacin, BIOORG MED, 9(7), 1999, pp. 973-978
Tuning the work function of gold with self-assembled monolayers derived from X-[C6H4-C C-](n)C6H4-SH (n = 0, 1, 2; X = H, F, CH3, CF3, and OCH3)
Authors: Zehner, RW Parsons, BF Hsung, RP Sita, LR
Citation: Rw. Zehner et al., Tuning the work function of gold with self-assembled monolayers derived from X-[C6H4-C C-](n)C6H4-SH (n = 0, 1, 2; X = H, F, CH3, CF3, and OCH3), LANGMUIR, 15(4), 1999, pp. 1121-1127
Inverse demand [4+2] cycloaddition reactions of allenamides: reactivity scopes of an electron deficient variant of allenamines
Authors: Wei, LL Xiong, H Douglas, CJ Hsung, RP
Citation: Ll. Wei et al., Inverse demand [4+2] cycloaddition reactions of allenamides: reactivity scopes of an electron deficient variant of allenamines, TETRAHEDR L, 40(38), 1999, pp. 6903-6907
Synthesis and UV studies of a small library of 6-aryl-4-hydroxy-2-pyrones.A relevant structural feature for the inhibitory property of arisugacin against acetylcholinesterase.
Authors: Douglas, CJ Sklenicka, HM Shen, HC Mathias, DS Degen, SJ Golding, GM Morgan, CD Shih, RA Mueller, KL Seurer, LM Johnson, EW Hsung, RP
Citation: Cj. Douglas et al., Synthesis and UV studies of a small library of 6-aryl-4-hydroxy-2-pyrones.A relevant structural feature for the inhibitory property of arisugacin against acetylcholinesterase., TETRAHEDRON, 55(48), 1999, pp. 13683-13696
Sequential 1,2-addition-electrocyclic ring closures involving acyclic alpha,beta-unsaturated iminiums: A formal [3+3] cycloaddition strategy to unique pyranyl spirocycles
Authors: Hsung, RP Shen, HC Douglas, CJ Morgan, CD Degen, SJ Yao, LJ
Citation: Rp. Hsung et al., Sequential 1,2-addition-electrocyclic ring closures involving acyclic alpha,beta-unsaturated iminiums: A formal [3+3] cycloaddition strategy to unique pyranyl spirocycles, J ORG CHEM, 64(3), 1999, pp. 690-691
A rare acid-promoted elimination of O-methyl oximes: A practical synthesisof 3-cyano-4-benzopyrones
Authors: Hsung, RP Zificsak, CA Wei, LL Zehnder, LR Park, F Kim, M Tran, TTT
Citation: Rp. Hsung et al., A rare acid-promoted elimination of O-methyl oximes: A practical synthesisof 3-cyano-4-benzopyrones, J ORG CHEM, 64(23), 1999, pp. 8736-8740
Risultati: 1-25 | 26-27