- Reversal of Nucleophilicity of Enamides in Water: Control of Cyclization Pathways by Reaction Media for the Orthogonal Synthesis of Dihydropyridinone and Pyrrolidinone Clausena Alkaloids.
[作者:Yang, Luo;Zheng, Qi-Yu;Wang, De-Xian;Huang, Zhi-Tang;Wang, Mei-Xiang;,期刊:Organic Letters, 页码:2461-2464 , 文章类型: 研究论文,,卷期:2008年10-12]
- A highly efficient, metal-free, and divergent method for the synthesis of 3,4-dihydropyridin-2-one (e.g. I) and pyrrolidin-2-one (e.g. II) Clausena alkaloids and their analogs from oxirane emamides (e.g. III) is reported...
- Regio- and Chemoselective Multiple Functionalization of Pyrimidine Derivatives by Selective Magnesiations using TMPMgCl譒iCl.
[作者:Mosrin, Marc;Knochel, Paul;,期刊:Organic Letters, 页码:2497-2500 , 文章类型: 研究论文,,卷期:2008年10-12]
- Successive regio- and chemoselective magnesiations of pyrimidines using TMPMgCl譒iCl furnish, after trapping with various electrophiles, highly functionalized derivs., e.g. I, in good to excellent yields. Applications to ...
- Chiral selector with multiple hydrogen-bonding sites in a macrocyclic cavity.
[作者:Ema, Tadashi;Tanida, Daisuke;Sugita, Kyoko;Sakai, Takashi;Miyazawa, Ken-ichiro;Ohnishi, Atsushi;,期刊:Organic Letters, 页码:2365-2368 , 文章类型: 研究论文,,卷期:2008年10-12]
- Chiral macrocycles with the hydrogen bond donor/acceptor sites in the cavity were synthesized and covalently bonded to silica gel to give chiral stationary phases (CSPs), which showed excellent abilities to resolve vario...
- Vapor-Phase Processable Novel Nonplanar Donor-Acceptor Quateraryls for Blue OLEDs.
[作者:Goel, Atul;Dixit, Manish;Chaurasia, Sumit;Kumar, Amit;Raghunandan, Resmi;Maulik, P. R.;Anand, R. S.;,期刊:Organic Letters, 页码:2553-2556 , 文章类型: 研究论文,,卷期:2008年10-12]
- Mass Spectroscopy and Other Related Properties) Section Thermally stable blue light emitting quateraryls with a piperidine donor and a nitrile acceptor were prepd. from a ketene-S,S-acetal under mild conditions without u...
- Total Synthesis of Sanguiin H-5.
[作者:Su, Xianbin;Surry, David S.;Spandl, Richard J.;Spring, David R.;,期刊:Organic Letters, 页码:2593-2596 , 文章类型: 研究论文,,卷期:2008年10-12]
- Using an atropdiastereoselective oxidative biaryl coupling as the key step, the total synthesis of the ellagitannin natural product sanguiin H-5 is reported. Both organomagnesium and organozinc based metalation methodol...
- Ainsliadimer A, a new sesquiterpene lactone dimer with an unusual carbon skeleton from Ainsliaea macrocephala.
[作者:Wu, Zhi-Jun;Xu, Xi-Ke;Shen, Yun-Heng;Su, Juan;Tian, Jun-Mian;Liang, Shuang;Li, Hui-Liang;Liu, Rui-Hui;Zhang, Wei-Dong;,期刊:Organic Letters, 页码:2397-2400 , 文章类型: 研究论文,,卷期:2008年10-12]
- A phytochem. investigation of Ainsliaea macrocephala led to the isolation of a new dimeric sesquiterpene lactone, ainsliadimer A (I). The structure of I was elucidated by spectroscopic anal., and confirmed by single crys...
- Rate-Accelerating Effect by the Neighboring-Group Participation of Protecting Groups in the Dehydrative Cyclization of 1,3,5-Triketones.
[作者:Sakakura, Akira;Watanabe, Hitoshi;Ishihara, Kazuaki;,期刊:Organic Letters, 页码:2569-2572 , 文章类型: 研究论文,,卷期:2008年10-12]
- Neighboring-group participation of an acyl protecting group efficiently promotes the Bronsted acid-catalyzed dehydrative cyclization of 1,3,5-triketones, e.g. (pivaloyloxy)trimethylnonanetrione I (R = Me3CCO), to g-pyron...
- Diastereoselective Synthesis of Tetrahydrofurans via Palladium(0)-Catalyzed [3 + 2] Cycloaddition of Vinylcyclopropanes and Aldehydes.
[作者:Parsons, Andrew T.;Campbell, Matthew J.;Johnson, Jeffrey S.;,期刊:Organic Letters, 页码:2541-2544 , 文章类型: 研究论文,,卷期:2008年10-12]
- Palladium(0)-catalyzed cycloaddns. of malonate-derived vinylcyclopropane I and aldehydes to afford 2,5-cis disubstituted THF derivs. II (R = Ph, 4-ClC6H4, 2-O2NC6H4, n-C5H11, etc.) are described. Pd loadings as low as 0....
- Total Synthesis of cis-Sylvaticin.
[作者:Brown, Lynda J.;Spurr, Ian B.;Kemp, Stephen C.;Camp, Nicholas P.;Gibson, Karl R.;Brown, Richard C. D.;,期刊:Organic Letters, 页码:2489-2492 , 文章类型: 研究论文,,卷期:2008年10-12]
- An asym. total synthesis of (+)-cis-sylvaticin [I, X = (CH2)7, Y = (CH2)9] is described. Key steps include the use of permanganate-mediated oxidative cyclization of 1,5-dienes to synthesize the two major fragments II an...
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