- Synthesis of Styrenes Using Ruthenium-Catalyzed Ring-Closing Enyne Metathesis.
[作者:Yoshida, Kazuhiro;Shishikura, Yuka;Takahashi, Hidetoshi;Imamoto, Tsuneo;,期刊:Organic Letters, 页码:2777-2780 , 文章类型: 研究论文,,卷期:2008年10-13]
- The synthesis of substituted styrenes, e.g. I (R1 = R2 = n-Pr), was achieved by ring-closing enyne metathesis (RCEM)/elimination of enyne substrates, e.g. II. The synthetic approach was also effective for a different ty...
- Organocatalytic Enantioselective Diels-Alder Reaction of Dienes with a-(N,N-Diacylamino)acroleins.
[作者:Ishihara, Kazuaki;Nakano, Kazuhiko;Akakura, Matsujiro;,期刊:Organic Letters, 页码:2893-2896 , 文章类型: 研究论文,,卷期:2008年10-13]
- Catalytic and highly enantioselective Diels-Alder reaction of cyclic and provides cyclic a-quaternary a-amino acid precursors, e.g. II (R = Me, Ph). The conformationally flexible chiral ammonium salt of H-L-Phe-L-Leu-N(...
- Facile synthesis and optical properties of bithiophenesilane monodendrons and dendrimers.
[作者:Luponosov, Yuriy N.;Ponomarenko, Sergei A.;Surin, Nikolay M.;Muzafarov, Aziz M.;,期刊:Organic Letters, 页码:2753-2756 , 文章类型: 研究论文,,卷期:2008年10-13]
- Three generations of bithiophenesilane monodendrons and dendrimers consisting of 3-45 2,2'-bithiene-5,5'-diyl units were synthesized by means of effective coupling reactions between the corresponding bithienyllithium der...
- O-Selective Condensation Using P-N Bond Cleavage in RNA Synthesis without Base Protection.
[作者:Ohkubo, Akihiro;Kuwayama, Yasukazu;Kudo, Tomomi;Tsunoda, Hirosuke;Seio, Kohji;Sekine, Mitsuo;,期刊:Organic Letters, 页码:2793-2796 , 文章类型: 研究论文,,卷期:2008年10-13]
- In RNA synthesis without base protection, a new method for O-selective condensation with more than 99% selectivity was developed by 6-nitro-HOBt-mediated cleavage of undesired P(III)-N bonds on nucleobase moieties. More...
- D3h-Symmetrical Hydrogen-Bonding Unit as a Saccharide Recognition and Self-Assembling Module.
[作者:Abe, Hajime;Horii, Asuka;Matsumoto, Shinya;Shiro, Motoo;Inouye, Masahiko;,期刊:Organic Letters, 页码:2685-2688 , 文章类型: 研究论文,,卷期:2008年10-13]
- A D3h-sym. triresorcinol module 1,3,5-tris(2,6-dihydroxy-4-pentylphenyl)benzene I was investigated in terms of its hydrogen-bonding ability for glycoside recognition and self-assocn. When I was treated with glycosides, ...
- Synthesis of an Advanced Intermediate for (+)-Pillaromycinone.
[作者:Staunton-Weinreb Annulation Revisited. White, James D.;Demnitz, F. W. J.;Xu, Qing;Martin, William H. C.;,期刊:Organic Letters, 页码:2833-2836 , 文章类型: 研究论文,,卷期:2008年10-13]
- Condensation of an orsellinate anion with a 2-cyclohexenone (Staunton-Weinreb annulation) afforded a linear tetracycle which was converted to a protected deriv. of 12a-epipillaromycinone. Methodol. for introducing a 12a...
- Anionic Indole N-Carbamoyl N ?C Translocation. A Directed remote Metalation Route to 2-Aryl- and 2-Heteroarylindoles. Synthesis of Benz[a]carbazoles and Indeno[1,2-b]indoles.
[作者:Zhao, Zhongdong;Jaworski, Ashley;Piel, Isabel;Snieckus, Victor;,期刊:Organic Letters, 页码:2617-2620 , 文章类型: 研究论文,,卷期:2008年10-13]
- A new LDA-induced anionic N-C carbamoyl migration of 2-arylindoles is reported. Treatment of 2-aryl-N-carbamoylindoles, readily available by direct and ipso-borodesilylative Suzuki-Miyaura cross-coupling routes from I a...
- Rhodium-Catalyzed Highly Enantio- and Diastereoselective Cotrimerization of Alkenes and Dialkyl Acetylenedicarboxylates Leading to Furylcyclopropanes.
[作者:Shibata, Yu;Noguchi, Keiichi;Hirano, Masao;Tanaka, Ken;,期刊:Organic Letters, 页码:2825-2828 , 文章类型: 研究论文,,卷期:2008年10-13]
- A cationic rhodium(I)/Segphos or H8-BINAP complex catalyzes the unprecedented cotrimerization of com. available monoenes and dialkyl acetylenedicarboxylates, leading to functionalized furylcyclopropanes, e.g. I (E = CO2R...
- An Intra/Intermolecular Suzuki Sequence to Benzopyridyloxepines Containing Geometrically Pure Exocyclic Tetrasubstituted Alkenes.
[作者:Carson, Matthew W.;Giese, Matthew W.;Coghlan, Michael J.;,期刊:Organic Letters, 页码:2701-2704 , 文章类型: 研究论文,,卷期:2008年10-13]
- A route to enable the prepn. of 5-benzylidenyl-benzopyridyloxepine analogs, e.g., I (R1 = Me, Et, i-Pr; R2 = H, F, MeO), was developed to continue our research in the field of nuclear hormone receptor modulators. The ke...
- Facile and Efficient One-Pot Synthesis of Highly Functionalized Thieno[2,3-b]thiopyran-4-ones from b-Keto e-Xanthyl Phosphonates.
[作者:Corbet, Matthieu;Zard, Samir Z.;,期刊:Organic Letters, 页码:2861-2864 , 文章类型: 研究论文,,卷期:2008年10-13]
- The one-pot synthesis of various functionalized thieno[2,3-b]thiopyran-4-ones, e.g. I, from readily available b-keto e-xanthyl phosphonates, e.g. II, has been accomplished by combining a Horner-Wadsworth-Emmons olefinati...
- A Synthesis of N-Bridged 5,6-Bicyclic Pyridines via A Mild Cyclodehydration Using the Burgess Reagent and Discovery of A Novel Carbamylsulfonylation Reaction.
[作者:Li, Jie Jack;Li, James J.;Li, Jun;Trehan, Ashok K.;Wong, Henry S.;Krishnananthan, Subramanian;Kennedy, Lawrence J.;Gao, Qi;Ng, Alicia;Robl, Jeffrey A.;Balasubramanian, Balu;Chen, Bang-Chi;,期刊:Organic Letters, 页码:2897-2900 , 文章类型: 研究论文,,卷期:2008年10-13]
- Cyclodehydration using the Burgess reagent provided a novel approach toward the synthesis of N-bridged 5,6-bicyclic pyridines including pyrrolo-, imidazo-, and triazolopyridines, e.g., I, under mild and neutral condition...
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