- A Simple, Modular Method for the Synthesis of 3,4,5-Trisubstituted Pyrazoles.
[作者:McLaughlin, Mark;Marcantonio, Karen;Chen, Cheng-yi;Davies, Ian W.;,期刊:Journal of Organic Chemistry, 页码:4309-4312 , 文章类型: 研究论文,,卷期:2008年73-11]
- A modular approach for the regiocontrolled prepn. of pyrazoles bearing substituents on all three carbon atoms is described. Central to this method is the use of a switchable metal-directing group to enable sequential di...
- Novel Chiral Calix[4]arenes by Direct Asymmetric Epoxidation Reaction.
[作者:Bonini, Carlo;Chiummiento, Lucia;Funicello, Maria;Lopardo, Maria Teresa;Lupattelli, Paolo;Laurita, Alessandro;Cornia, Andrea;,期刊:Journal of Organic Chemistry, 页码:4233-4236 , 文章类型: 研究论文,,卷期:2008年73-11]
- The first asym. synthesis of trans optically active (+) C2 1,3-bisarylepoxide of calix[4]arene I in excellent chem. yield and >99% ee, and its enantiospecific conversion to the corresponding bis-dioxolane II is reported....
- Asymmetric Reductive Acylation of Aromatic Ketoximes by Enzyme-Metal Cocatalysis.
[作者:Han, Kiwon;Park, Jaiwook;Kim, Mahn-Joo;,期刊:Journal of Organic Chemistry, 页码:4302-4304 , 文章类型: 研究论文,,卷期:2008年73-11]
- An efficient procedure for the asym. synthesis of chiral amides I [R1 = Me, Et, R2 = H, R3 = H, Me, CF3, OMe; R1R2 = (CH2)2, (CH2)3, CH2CH2O, R3 = H] from ketoximes II has been developed. This one-pot procedure employs ...
- Improved Procedure for the Bimolecular Oxidative Amidation of Phenols.
[作者:Liang, Huan;Ciufolini, Marco A.;,期刊:Journal of Organic Chemistry, 页码:4299-4301 , 文章类型: 研究论文,,卷期:2008年73-11]
- Trifluoroacetic acid (TFA) is an effective promoter of the bimol. Ritter-like oxidative amidation of 4-substituted phenols, e.g. RC6H4OH (R = CH2CO2Me, Et, CH2CN), induced by PhI(OAc)2 in MeCN. This suppresses the need ...
- Synthesis of Stable Derivatives of Cycloprop-2-ene Carboxylic Acid.
[作者:Yan, Ni;Liu, Xiaozhong;Pallerla, Mahesh K.;Fox, Joseph M.;,期刊:Journal of Organic Chemistry, 页码:4283-4286 , 文章类型: 研究论文,,卷期:2008年73-11]
- from acetylene and Et diazoacetate are described. Unlike other cyclopropenes that bear a single substituent at C-3, these compds. are stable to long-term storage. Although the cyclopropene derivs. are unusually stable,...
- Stable Ion and Electrophilic Chemistry of the Sterically Crowded Stilbene 1,1'-Bi(benzocyclobutenylidene) and Its Derivatives.
[作者:Laali, Kenneth K.;Okazaki, Takao;Bunge, Scott D.;Lenoir, Dieter;,期刊:Journal of Organic Chemistry, 页码:4092-4100 , 文章类型: 研究论文,,卷期:2008年73-11]
- Generation and NMR studies of novel carbocations and carboxonium ions are reported from sterically hindered stilbene 1,1'-bi(benzocyclobutenylidene), its dimethoxy deriv., and from their skeletally rearranged derivs. inc...
- Cation coordination induced modulation of the anion sensing properties of a ferrocene-imidazophenanthroline Dyad: Multichannel recognition from phosphate-related to chloride anions.
[作者:Zapata, Fabiola;Caballero, Antonio;Espinosa, Arturo;Tarraga, Alberto;Molina, Pedro;,期刊:Journal of Organic Chemistry, 页码:4034-4044 , 文章类型: 研究论文,,卷期:2008年73-11]
- A new chemosensor mol., 2-ferroceny-1H-imidazo[4,5-f][1,10]-phenanthroline (I) based on a ferrocene-imidazophenanthroline dyad, effectively recognizes aq. hydrogenpyrophosphate and the org. anions ADP and ATP through thr...
- Enantioselective fluorescence sensing of chiral a-amino alcohols.
[作者:Liu, Shuanglong;Pestano, John Paul C.;Wolf, Christian;,期刊:Journal of Organic Chemistry, 页码:4267-4270 , 文章类型: 研究论文,,卷期:2008年73-11]
- 1,8-Bis(3-tert-butyl-9-acridyl)naphthalene N,N'-dioxide, was synthesized in five steps from 3-tert-butylaniline and 2-chlorobenzoic acid in 29% overall yield. This C2-sym. ligand forms a highly fluorescent scandium comp...
- Bisphosphonate Derivatives of Nucleoside Antimetabolites: Hydrolytic Stability and Hydroxyapatite Adsorption of 5'-b,g-Methylene and 5'-b,g-(1-Hydroxyethylidene) Triphosphates of 5-Fluorouridine and ara-Cytidine.
[作者:Ora, Mikko;Lonnberg, Tuomas;Florea-Wang, Diana;Zinnen, Shawn;Karpeisky, Alexander;Lonnberg, Harri;,期刊:Journal of Organic Chemistry, 页码:4123-4130 , 文章类型: 研究论文,,卷期:2008年73-11]
- Kinetics of the hydrolytic reactions of four bisphosphonate derivs. of nucleoside antimetabolites, viz., 5-fluorouridine 5'-b,g-(1-hydroxyethylidene) triphosphate (I), 5-fluorouridine 5'-b,g-methylene triphosphate (II), ...
- Intrinsic Conformational Preferences of Ca,a-Dibenzylglycine.
[作者:Casanovas, Jordi;Nussinov, Ruth;Aleman, Carlos;,期刊:Journal of Organic Chemistry, 页码:4205-4211 , 文章类型: 研究论文,,卷期:2008年73-11]
- The intrinsic conformational preferences of Ca,a-dibenzylglycine, a sym. a,a-dialkylated amino acid bearing two benzyl substituents on the a-carbon atom, have been detd. using quantum chem. calcns. at the B3LYP/6-31+G(d,...
- Stereoselective Synthesis and Conformational Study of Novel 2',3'-Didehydro-2',3'-dideoxy-4'-selenonucleosides.
[作者:Tosh, Dilip K.;Choi, Won Jun;Kim, Hea Ok;Lee, Yoonji;Pal, Shantanu;Hou, Xiyan;Choi, Jungwon;Choi, Sun;Jeong, Lak Shin;,期刊:Journal of Organic Chemistry, 页码:4259-4262 , 文章类型: 研究论文,,卷期:2008年73-11]
- Stereoselective synthesis of novel was accomplished via 4'-selenoribofuranosyl pyrimidines, as key intermediates. 4'-Selenoribofuranosyl pyrimidines were efficiently synthesized from D-ribose or D-gulonic g-lactone using...
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