Chemically stable homocinnamyl analogs of the leukotrienes: synthesis and preliminary biological evaluation
作者:P. R. Bernstein、D. W. Snyder、E. J. Adams、R. D. Krell、E. P. Vacek、A. K. Willard
DOI:10.1021/jm00162a010
日期:1986.12
7Z)-6-S-glutathionyl-5-hydroxy-9-(4-heptanylphenyl)-7 -nonenoic acid. This analogue has an EC50 value of 74.5 nM, in the presence of 1-serine borate (45 mM), on guinea pig tracheal spirals. The agonist activity of the cysteinylglycinyl- and the cysteinyl-substituted analogues was inhibited by FPL-55712. Three of the analogues were weak leukotriene antagonists in vitro on guinea pig tracheal spirals. The most potent
Catalytic asymmetric carbon–carbon bond formation via allylic alkylations with organolithium compounds
作者:Manuel Pérez、Martín Fañanás-Mastral、Pieter H. Bos、Alena Rudolph、Syuzanna R. Harutyunyan、Ben L. Feringa
DOI:10.1038/nchem.1009
日期:2011.5
been developed for asymmetric C–C bond formation to yield single enantiomers from several organometallic reagents. Remarkably, for extremely reactive organolithium compounds, which are among the most broadly used reagents in chemical synthesis, a general catalytic methodology for enantioselective C–C formation has proven elusive, until now. Here, we report a copper-based chiral catalyticsystem that
Franks, Stephen; Hartley, Frank R., Journal of the Chemical Society. Perkin transactions I, 1980, p. 2233 - 2237
作者:Franks, Stephen、Hartley, Frank R.
DOI:——
日期:——
Synthesis of 4-Nitrophenyl Sulfones and Application in the Modified Julia Olefination
作者:Jieping Zhu、Daniela Mirk、Jean-Marie Grassot
DOI:10.1055/s-2006-939682
日期:——
4-Nitrophenyl (NP) sulfones were successfully employed in the modifiedJuliaolefination reaction with carbonyl compds. The olefination reaction proceeds through a sequence of aldol addn., Smiles rearrangement, and elimination. The sulfones are easily prepd. in high yields in a two-step sequence starting from inexpensive com. available para-fluoronitrobenzenes via nucleophilic arom. substitution by
4-硝基苯基 (NP) 砜成功地用于与羰基化合物的改性 Julia 烯化反应。烯化反应通过羟醛加成、Smiles 重排和消除的顺序进行。砜很容易制备。从廉价的 com 开始,以两步顺序高产。可通过亲核芳族获得对氟硝基苯。被硫醇取代,随后被氧化。在标准下。使适应。NP 砜与多种芳烃之间的改良 Julia 反应。醛提供相应的苯乙烯、芪和肉桂酸酯衍生物。产率 ?97% 和良好的立体选择性。提出了机械原理来解释 obsd。结果。[在 SciFinder (R) 上]
Iron(II)-Catalyzed Site-Selective Functionalization of Unactivated C(sp<sup>3</sup>
)−H Bonds Guided by Alkoxyl Radicals
作者:Honghao Guan、Shutao Sun、Ying Mao、Lei Chen、Ran Lu、Jiancheng Huang、Lei Liu
DOI:10.1002/anie.201806434
日期:2018.8.27
for site‐selectivefunctionalization of unactivated methylene and methine C−H bonds enabled by an FeII‐catalyzed redox process is described. The mild, expeditious, and modular protocol allows efficient remote aliphatic fluorination, chlorination, amination, and alkynylation of structurally and electronically varied primary, secondary, and tertiary hydroperoxides with excellent functional‐group tolerance