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文章名     作者     期刊名     摘要     卷     期         如果没有找到您所需要的文献，请点击 ——此处申请     共60条记录   Direct Catalytic Asymmetric Mannich-Type Reactions of g-Butenolides: Effectiveness of Bronsted Acid in Chiral Metal Catalysis. [作者：Yamaguchi, Akitake;Matsunaga, Shigeki;Shibasaki, Masakatsu;,期刊：Organic Letters, 页码：2319-2322 , 文章类型： 研究论文，,卷期：2008年10-11] Direct catalytic asym. Mannich-type reactions of g-butenolides I (R = H, Me) are described. A chiral Lewis acid/amine base/Bronsted acid combination was used to catalyze a g-addn. of g-butenolides to N-diphenylphosphino... A Formal Synthesis of the Auriside Aglycon. [作者：Tello-Aburto, Rodolfo;Olivo, Horacio F.;,期刊：Organic Letters, 页码：2191-2194 , 文章类型： 研究论文，,卷期：2008年10-11] A highly convergent formal synthesis of the auriside aglycon was achieved. An indene-based thiazolidinethione chiral auxiliary (I) was fragments via acetate aldol reactions. A Meinwald reaction was utilized to install ... Asymmetric Total Synthesis of (+)-Phoslactomycin B. [作者：Shibahara, Setsuya;Fujino, Masataka;Tashiro, Yasumasa;Takahashi, Keisuke;Ishihara, Jun;Hatakeyama, Susumi;,期刊：Organic Letters, 页码：2139-2142 , 文章类型： 研究论文，,卷期：2008年10-11] (+)-Phoslactomycin B (I) was synthesized by a highly enantio- and stereoselective approach involving asym. pentenylation, Suzuki-Miyaura coupling, ring-closing metathesis, asym. dihydroxylation, and Stille coupling. The... A Regiodivergent Synthesis of Ring A C-Prenylflavones. [作者：Minassi, Alberto;Giana, Anna;Ech-Chahad, Abdellah;Appendino, Giovanni;,期刊：Organic Letters, 页码：2267-2270 , 文章类型： 研究论文，,卷期：2008年10-11] (Biomolecules and Their Synthetic Analogs) Section Capitalizing on the use of orthogonal protecting groups and the development of a modified Robinson flavone synthesis that avoids harsh acidic conditions, a regioselectiv... Synthetic Utility of an Isolable Nucleoside Phosphonium Salt. [作者：Bae, Suyeal;Lakshman, Mahesh K.;,期刊：Organic Letters, 页码：2203-2206 , 文章类型： 研究论文，,卷期：2008年10-11] The reaction of O6-benzyl-3',5'-bis-O-(tert-butyldimethylsilyl)-2'-deoxyxanthosine with 1H-benzotriazol-1-yloxy-tris(dimethylamino)phosphonium hexafluorophosphate (BOP) yielded the nucleoside C-2 tris(dimethylamino)phosp... Modular Synthesis of Benzo[b]phosphole Derivatives via BuLi-Mediated Cyclization of (o-Alkynylphenyl)phosphine. [作者：Tsuji, Hayato;Sato, Kosuke;Ilies, Laurean;Itoh, Yoshimitsu;Sato, Yoshiharu;Nakamura, Eiichi;,期刊：Organic Letters, 页码：2263-2265 , 文章类型： 研究论文，,卷期：2008年10-11] Treatment of an (o-alkynylphenyl)phosphine, 2-PhCYCC6H4P(H)Mes* (Mes* = 2,4,6-tri-tert-butylphenyl) with a stoichiometric amt. of BuLi effects a cyclization reaction to produce a 3-lithiobenzo[b]phosphole, which affords ... Stereocontrolled Synthesis of the A/B-Ring Fragment of Gambieric Acid B: Reassignment of the Absolute Configuration of the Polycyclic Ether Region. [作者：Fuwa, Haruhiko;Goto, Tomomi;Sasaki, Makoto;,期刊：Organic Letters, 页码：2211-2214 , 文章类型： 研究论文，,卷期：2008年10-11] Stereocontrolled synthesis of the A/B-ring fragment I of the originally assigned structure of gambieric acid B and its possible diastereomers has been accomplished. Detailed comparison of their 1H and 13C NMR data with ... A Novel DNA Hairpin Substrate for Bleomycin. [作者：Akiyama, Yoshitsugu;Ma, Qian;Edgar, Erin;Laikhter, Andrei;Hecht, Sidney M.;,期刊：Organic Letters, 页码：2127-2130 , 文章类型： 研究论文，,卷期：2008年10-11] 2'-deoxyribose at position 15 has been prepd. and found to lack significant fluorescence. When treated with Fe(II)譈LM, the hairpin was found to undergo oxidative transformation selectively at position 15. The predominan... Highly Selective Ratiometric Fluorescence Determination of Ag+ Based on a Molecular Motif with One Pyrene and Two Adenine Moieties. [作者：Liu, Lei;Zhang, Deqing;Zhang, Guanxin;Xiang, Junfeng;Zhu, Daoben;,期刊：Organic Letters, 页码：2271-2274 , 文章类型： 研究论文，,卷期：2008年10-11] A highly selective ratiometric fluorescence sensor for Ag+ was developed with a mol. motif contg. one pyrene and two adenine moieties. Tailoring the properties of boron-dipyrromethene dyes with acetylenic functions at the 2,6,8 and 4-B substitution positions. [作者：Bonardi, Laure;Ulrich, Gilles;Ziessel, Raymond;,期刊：Organic Letters, 页码：2183-2186 , 文章类型： 研究论文，,卷期：2008年10-11] Organic Pigments, Fluorescent Brighteners, and Photographic Substitution of B,B-difluoro-Bodipy with arylalkynyl residues at boron, at the pyrrolic core, or at the meso position provides unique tri-, tetra-, and pentasub... Triaryl(1-pyrenyl)bismuthonium Salts: Efficient Photoinitiators for Cationic Polymerization of Oxiranes and a Vinyl Ether. [作者：Matano, Yoshihiro;Shinokura, Tomonori;Yoshikawa, Osamu;Imahori, Hiroshi;,期刊：Organic Letters, 页码：2167-2170 , 文章类型： 研究论文，,卷期：2008年10-11] Photoirradn. of triaryl(1-pyrenyl)bismuthonium salts in acetonitrile afforded triarylbismuthanes and pyrene, accompanied by the generation of protic acids. Triaryl(1-pyrenyl)bismuthonium hexafluoroantimonates have prove... Total Synthesis of (-)-Dysithiazolamide. [作者：Arda, Ana;Soengas, Raquel G.;Nieto, M. Isabel;Jimenez, Carlos;Rodriguez, Jaime;,期刊：Organic Letters, 页码：2175-2178 , 文章类型： 研究论文，,卷期：2008年10-11] The tetrachlorinated natural product (-)-dysithiazolamide was synthesized from L-glutamic acid in a convergent way, confirming the previously proposed (2S,4S,6S,8S) abs. stereochem. De Novo Synthesis of the Trisaccharide Subunit of Landomycins A and E. [作者：Zhou, Maoquan;O'Doherty, George A.;,期刊：Organic Letters, 页码：2283-2286 , 文章类型： 研究论文，,卷期：2008年10-11] b-D-olivose as well as the trisaccharide portion of landomycin A from achiral acetyl furan has been developed. The key transformations include the palladium-catalyzed glycosylation, Myers' reductive rearrangement, diast... Rearrangement of a Cyclohexyl Radical to a Cyclopentylmethyl Radical on the Avermectin Skeleton. [作者：Kessabi, Fiona Murphy;Winkler, Tammo;Luft, Jennifer A. R.;Houk, K. N.;,期刊：Organic Letters, 页码：2255-2258 , 文章类型： 研究论文，,卷期：2008年10-11] The rearrangement of a substituted cyclohexyl radical to a cyclopentylmethyl radical on the skeleton of avermectin B1 was obsd. exptl. and explored computationally. The Stork-Nishiyama methodol. was applied to the macro... Stereocontrolled Synthesis of the Sterically Encumbered F Ring of Lancifodilactone G. [作者：Lai, Kwong Wah;Paquette, Leo A.;,期刊：Organic Letters, 页码：2115-2118 , 文章类型： 研究论文，,卷期：2008年10-11] A stereochem. linear strategy has been developed to prep. the heavily congested F-ring sector I of lancifodilactone G (II) from com. inexpensive (R)-carvone. Prominent operations in our synthesis include Negishi-type sp... Studies Directed toward the Total Synthesis of Lancifodilactone G: An Expeditious Route to the ABC Subunit. [作者：Paquette, Leo A.;Lai, Kwong Wah;,期刊：Organic Letters, 页码：2111-2113 , 文章类型： 研究论文，,卷期：2008年10-11] An efficient entry to the ABC network I of lancifodilactone G is outlined. The C ring is constructed by way of enyne ring-closing metathesis of II. The AB component is established via a base-mediated biomimetic oxy-Micha...