个性化文献订阅>文章检索

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61条记录   Enantioselective synthesis of anti-b-substituted g,d-unsaturated amino acids: a highly selective asymmetric thio-Claisen rearrangement. [作者：[Erratum to document cited in CA149:331946]. Liu, Zhihua;Qu, Hongchang;Gu, Xuyuan;Min, Byoung J.;Nyberg, Joel;Hruby, Victor J.;,期刊：Organic Letters, 页码：497-497 , 文章类型： 研究论文，,卷期：2009年11-2] On page 4105, the author list was incomplete, and should read: "Zhihua Liu, Hongchang Qu, Xuyuan Gu, Byoung J. Min, Gary S. Nichol, Joel Nyberg, and Victor J. Hruby". On page S1, in the Supporting Information, the list ... Reaction discovery employing macrocycles: transannular cyclizations of macrocyclic bis-lactams. [作者：Han, Chong;Rangarajan, Sathish;Voukides, Alicia C.;Beeler, Aaron B.;Johnson, Richard;Porco, John A.;,期刊：Organic Letters, 页码：413-416 , 文章类型： 研究论文，,卷期：2009年11-2] Macrocyclic bis-lactams have been synthesized by cyclodimerization of homoallylic amino esters employing a Zr(IV)-catalyzed ester-amide exchange protocol. Base-mediated transannular cyclizations have been identified to ... Direct preparation of unsymmetrical difunctionalized cyclen derivatives by an Ugi multicomponent reaction. [作者：Piersanti, Giovanni;Remi, Francesco;Fusi, Vieri;Formica, Mauro;Giorgi, Luca;Zappia, Giovanni;,期刊：Organic Letters, 页码：417-420 , 文章类型： 研究论文，,卷期：2009年11-2] An efficient synthetic protocol for the prepn. of unsym. difunctionalized cyclen and its close derivs. using a modified Ugi reaction (N-split Ugi) is described. The scope of this methodol. is further extended by the suc... Catalytic asymmetric synthesis of an HIV integrase inhibitor. [作者：Zhong, Yong-Li;Krska, Shane W.;Zhou, Hua;Reamer, Robert A.;Lee, Jaemoon;Sun, Yongkui;Askin, David;,期刊：Organic Letters, 页码：369-372 , 文章类型： 研究论文，,卷期：2009年11-2] An efficient synthesis of HIV integrase inhibitor I via a unique asym. hydrogenation of a mixt. of imines/enamine is described. Hydrogenation of the imines/enamine by a Rh(I)-Josiphos complex afforded II in 90% yield and... A Novel and Convenient Protocol for Synthesis of Pyridazines. [作者：Attanasi, Orazio A.;Favi, Gianfranco;Filippone, Paolino;Perrulli, Francesca R.;Santeusanio, Stefania;,期刊：Organic Letters, 页码：309-312 , 文章类型： 研究论文，,卷期：2009年11-2] A new flexible strategy for the synthesis of diversely functionalized pyridazines from 4-chloro-1,2-diaza-1,3-butadienes and active methylene compds. is reported. The high chemoselectivity of this approach offers access... A Straightforward Synthesis of Benzothiazines. [作者：Gimbert, Carolina;Vallribera, Adelina;,期刊：Organic Letters, 页码：269-271 , 文章类型： 研究论文，,卷期：2009年11-2] A series of 4H-3,1-benzothiazines (I, R = alkyl, aryl; Z = CO2Et, CN) have been successfully synthesized through a three-step sequence starting from com. available 2-iodoaniline. The key step consists of the cyclization... Regio- and Chemoselective Synthesis of Fully Substituted Thiophenes. [作者：Piller, Fabian M.;Knochel, Paul;,期刊：Organic Letters, 页码：445-448 , 文章类型： 研究论文，,卷期：2009年11-2] A full functionalization of all four positions of the thiophene ring was achieved. Starting from readily available 2,5-dichlorothiophene, successive magnesiations of the 3- and 4-positions using TMPMgCl譒iCl furnish, aft... Singlet-Oxygen-Mediated One-Pot Synthesis of 3-Keto-tetrahydrofurans from 2-(b-Hydroxyalkyl) Furans. [作者：Tofi, Maria;Koltsida, Konstantina;Vassilikogiannakis, Georgios;,期刊：Organic Letters, 页码：313-316 , 文章类型： 研究论文，,卷期：2009年11-2] Photooxygenation of 2-(b-hydroxyalkyl) furans affords, in one synthetic operation and in high yields, 3-keto-tetrahydrofuran motifs via intramol. Michael-type addn. to the 1,4-enedione intermediate. Synthesis of Optically Active Arylaziridines by Regio- and Stereospecific Lithiation of N-Bus-Phenylaziridine. [作者：Musio, Biagia;Clarkson, Guy J.;Shipman, Michael;Florio, Saverio;Luisi, Renzo;,期刊：Organic Letters, 页码：325-328 , 文章类型： 研究论文，,卷期：2009年11-2] a,a-Disubstituted aziridines, e.g. I (R = SiMe2, D, SnBu3, Me, etc.), can be produced in good yields by selective lithiation of N-tert-butylsulfonyl-2-phenylaziridine (n-BuLi/TMEDA, Et2O) at the benzylic position and sub... Toward the Total Synthesis of the Brasilinolides: Stereocontrolled Assembly of a C1-C19 Polyol Segment. [作者：Paterson, Ian;Muhlthau, Friedrich A.;Cordier, Christopher J.;Housden, Michael P.;Burton, Paul M.;Loiseleur, Olivier;,期刊：Organic Letters, 页码：353-356 , 文章类型： 研究论文，,卷期：2009年11-2] such as brasilinolide A is prepd. convergently using the 1,5-anti distereoselective aldol addn. reactions of dicyclohexylboron enolates derived from Me ketones with nonracemic aldehydes as the key steps. I is assembled f... Palladium-Indolylphosphine-Catalyzed Hiyama Cross-Coupling of Aryl Mesylates. [作者：So, Chau Ming;Lee, Hang Wai;Lau, Chak Po;Kwong, Fuk Yee;,期刊：Organic Letters, 页码：317-320 , 文章类型： 研究论文，,卷期：2009年11-2] Aryl mesylates are found to be applicable as electrophiles in organosilicon-mediated coupling reactions. The catalyst system comprising 2 mol % of Pd(OAc)2 and CM-phos supporting ligand is highly effective in catalyzing... A simple base-mediated halogenation of acidic sp2 C-H bonds under noncryogenic conditions. [作者：Do, Hien-Quang;Daugulis, Olafs;,期刊：Organic Letters, 页码：421-423 , 文章类型： 研究论文，,卷期：2009年11-2] A method has been developed for in situ halogenation of acidic sp2 carbon-hydrogen bonds in heterocycles and electron-deficient arenes. Either selective monohalogenation or one-step exhaustive polyhalogenation is possibl... Copper-Catalyzed 2:1 Coupling Reaction of Arynes with Alkynes. [作者：Yoshida, Hiroto;Morishita, Takami;Nakata, Hiromi;Ohshita, Joji;,期刊：Organic Letters, 页码：373-376 , 文章类型： 研究论文，,卷期：2009年11-2] A formal insertion reaction of two molar amts. of arynes into a C-H bond of terminal alkynes is efficaciously catalyzed by copper(I) chloride, giving 2-alkynylbiaryls in one step. Photoinduced Three-Component Reaction: A Convenient Access to 3-Arylacetals or 3-Arylketals. [作者：Lazzaroni, Simone;Protti, Stefano;Fagnoni, Maurizio;Albini, Angelo;,期刊：Organic Letters, 页码：349-352 , 文章类型： 研究论文，,卷期：2009年11-2] A mild and versatile method for the photoinduced three-component synthesis of 3-arylacetals and ketals is presented. Desired targets are smoothly obtained by irradiating arom. halides or esters in alcs., in the presence... Exploration of the "traceless" reductive ligation of S-nitrosothiols. [作者：Zhang, Jiming;Wang, Hua;Xian, Ming;,期刊：Organic Letters, 页码：477-480 , 文章类型： 研究论文，,卷期：2009年11-2] The first "traceless" reductive ligation of S-nitrosothiols using phosphine ester/thioester conjugates is reported. It was also shown that stable thioimidate compds. could be formed in the reaction between S-nitrosothio... A Facile Deprotection of Secondary Acetamides. [作者：Koenig, Stefan G.;Vandenbossche, Charles P.;Zhao, Hang;Mousaw, Patrick;Singh, Surendra P.;Bakale, Roger P.;,期刊：Organic Letters, 页码：433-436 , 文章类型： 研究论文，,卷期：2009年11-2] Imidoyl chlorides, generated from secondary acetamides and oxalyl chloride, can be harnessed for a selective and practical deprotection sequence. Treatment of these intermediates with 2 equiv of propylene glycol and war...