- Total Synthesis of (?-a-Isosparteine, (?-b-Isosparteine, and (?-Sparteine from a Common Tetraoxobispidine Intermediate.
[作者:Norcross, Neil R.;Melbardis, John P.;Solera, Margarita Ferris;Sephton, Mark A.;Kilner, Colin;Zakharov, Lev N.;Astles, Peter C.;Warriner, Stuart L.;Blakemore, Paul R.;,期刊:Journal of Organic Chemistry, 页码:7939-7951 , 文章类型: 研究论文,,卷期:2008年73-20]
- The three title alkaloids were sep. prepd. in stereocontrolled fashion from a common tetraoxobispidine precursor, 3,7-diallyl-2,4,6,8-tetraoxo-3,7-diazabicyclo[3.3.1]nonane (I). Bisimide I was generated from malonate vi...
- Macrocyclic Cyclophanes with Two and Three a,w-Dichalcogena-1,4-diethynylaryl Units: Syntheses and Structural Properties.
[作者:Werz, Daniel B.;Fischer, Felix R.;Kornmayer, Stefan C.;Rominger, Frank;Gleiter, Rolf;,期刊:Journal of Organic Chemistry, 页码:8021-8029 , 文章类型: 研究论文,,卷期:2008年73-20]
- By means of four- and six-component cyclization reaction various salts of 1,4-di(ethynyl)benzene, 4,4'-di(ethynyl)biphenyl, 1,4-di(ethynyl)-2,5-di(n-hexyl)benzene and 1,4-di(ethynyl)-2,5-di(n-propyl)benzene. These build...
- Ring-Enlargement of Dimethylaminopropenoyl Cyclopropanes: An Efficient Route to Substituted 2,3-Dihydrofurans.
[作者:Zhang, Rui;Liang, Yongjiu;Zhou, Guangyuan;Wang, Kewei;Dong, Dewen;,期刊:Journal of Organic Chemistry, 页码:8089-8092 , 文章类型: 研究论文,,卷期:2008年73-20]
- A convenient and efficient synthesis of substituted dihydrofurans, e.g., I, is developed via ring-enlargement of 1-dimethylaminopropenoyl-1-carbamoyl/benzoyl cyclopropanes catalyzed by ammonium acetate in acetic acid wit...
- Formal Cycloaddition of Disubstituted Ketenes with 2-Oxoaldehydes Catalyzed by Chiral N-Heterocyclic Carbenes.
[作者:He, Lin;Lv, Hui;Zhang, Yan-Rong;Ye, Song;,期刊:Journal of Organic Chemistry, 页码:8101-8103 , 文章类型: 研究论文,,卷期:2008年73-20]
- Chiral N-heterocyclic carbenes were found to be efficient catalysts for the formal [2 + 2] cycloaddn. reactions of alkyl(aryl)ketenes with 2-oxoaldehydes to afford b-lactones, e.g. I, with a-quaternary-b-tertiary stereoc...
- A New Efficient Route to 2-Substituted Azulenes Based on Sulfonyl Group Directed Lithiation.
[作者:Shibasaki, Toshihisa;Ooishi, Takeo;Yamanouchi, Nobuhiko;Murafuji, Toshihiro;Kurotobi, Kei;Sugihara, Yoshikazu;,期刊:Journal of Organic Chemistry, 页码:7971-7977 , 文章类型: 研究论文,,卷期:2008年73-20]
- Directed lithiation of p-tolyl 1-azulenyl sulfone at the 2-position of the azulenyl group was achieved by using lithium 2,2,6,6-tetramethylpiperidide (LTMP). The azulenyllithium thus generated could be efficiently trapp...
- Base Controlled Polydiazeniumdiolation of 4-Heptanone and a New Water Layer Structure.
[作者:Arulsamy, Navamoney;Bohle, D. Scott;Chuang, Chuan-Hung;Moore, Raecca C.;,期刊:Journal of Organic Chemistry, 页码:8077-8080 , 文章类型: 研究论文,,卷期:2008年73-20]
- In a stoichiometry-controlled reaction, nitric oxide adds to the enolate of 4-heptanone at ca. -23 癈 to give mono-, bis-, or tris-diazeniumdiolate (-N2O2-) products: potassium 4-heptanone-3,3,5-tris(diazeniumdiolate), po...
- Nucleophilic Fluorination of Triflates by Tetrabutylammonium Bifluoride.
[作者:Kim, Kyu-Young;Kim, Bong Chan;Lee, Hee Bong;Shin, Hyunik;,期刊:Journal of Organic Chemistry, 页码:8106-8108 , 文章类型: 研究论文,,卷期:2008年73-20]
- Careful examn. of nucleophilicity, basicity, and leaving group ability led us to discover the nucleophilic fluorination of triflates by weakly basic tetrabutylammonium bifluoride, which provides excellent yields with min...
- Asymmetric Pauson-Khand-type Reaction Mediated by Rh(I) Catalyst at Ambient Temperature.
[作者:Kim, Dong Eun;Kim, In Su;Ratovelomanana-Vidal, Virginie;Genet, Jean-Pierre;Jeong, Nakcheol;,期刊:Journal of Organic Chemistry, 页码:7985-7989 , 文章类型: 研究论文,,卷期:2008年73-20]
- An efficient asym. PKR mediated by Rh(I) catalyst at ambient temp. was developed. The reaction utilizing a Rh(I) catalyst bearing a (R)-3,5-diMeC4H4-BINAP ligand at 18-20 癈 under a reduced partial pressure of CO (0.1 at...
- Neighboring group participation of phosphine oxide functionality in the highly regio- and stereoselective iodohydroxylation of 1,2-allenylic diphenyl phosphine oxides.
[作者:Guo, Hao;Qian, Rong;Guo, Yinlong;Ma, Shengming;,期刊:Journal of Organic Chemistry, 页码:7934-7938 , 文章类型: 研究论文,,卷期:2008年73-20]
- Allenyl phosphine oxides R2R3C:C:CR1P(O)Ph2 (1a-l) undergo stereoselective iodohydroxylation by reaction with I2/H2O in MeCN, giving 3-phosphinylallyl alcs. (E)-HOCR2R3CI:CR1P(O)Ph2 (2a-l; R1, R2, R3 = H, Me, Et, n-Pr, C...
- Thermal Rearrangement of Indolyl Oxime Esters to Pyridoindoles.
[作者:Portela-Cubillo, Fernando;Surgenor, Brian A.;Aitken, R. Alan;Walton, John C.;,期刊:Journal of Organic Chemistry, 页码:8124-8127 , 文章类型: 研究论文,,卷期:2008年73-20]
- Acyl oximes derived from a variety of indolylalkanones underwent a ring closure sequence during FVP to afford 9H-pyrido[2,3-b]indoles. Unlike UV light promoted reactions of oxime esters, the mechanism is almost certainl...
- Temperature-controlled synthesis of substituted pyridine derivatives via the [5C + 1N] annulation of 1,1-bisalkylthio-1,4-pentanedienes and ammonium acetate. [Erratum to document cited in CA148:403053].
[作者:Hu, Jianglei;Zhang, Qian;Yuan, Hongjuan;Liu, Qun;,期刊:Journal of Organic Chemistry, 页码:8132-8132 , 文章类型: 研究论文,,卷期:2008年73-20]
- On page 2445, the CIF for compd. 5a provided in the Supporting Information is incorrect; The correct file is attached.
|