474 伯、仲和叔糠基取代的环烷基胺、二胺及其与有机酸和无机酸的盐。胺盐是潜在的 ACE 抑制剂的证据 [3] 激发了对该研究的兴趣。我们通过糠基-亚基环酮的催化加氢胺化的方法合成了一系列2-(2-糠基)环烷基胺(I IV)。反应在氨或甲胺的醇溶液中,在 100℃ 的温度和 10 MPa 的氢气压力下,在雷尼镍催化剂的存在下进行 [4, 5]。胺 I IV 与醇溶液中的有机酸的相互作用导致马来酸盐 V VIII 和柠檬酸盐 IXXI 的产率分别为 4 3 9 5% 和 35-29%。酸的浓度取决于马来酸盐和柠檬酸盐的纯化能力,它们在水中的溶解度,和它们的低吸湿性(与无机酸盐相比)。通过氰乙基化反应和中间体氨基腈 XII 和 XIII 的催化还原反应,由伯胺 I 和 III 合成呋喃系列二胺(XIV 和 XV),产率为 7 6 7 9 %。胺 I 和 III 的氰乙基化在催化量的乙酸酐和氢醌(丙烯腈稳定剂)的存在下进行。氨基腈
Reaction of α,β-unsaturated ketones with tetracyanoethylene
作者:Vladimir P Sheverdov、Oleg V Ershov、Oleg E Nasakin、Anatoly N Chernushkin、Victor A Tafeenko、Sergei I Firgang
DOI:10.1016/s0040-4020(01)00491-4
日期:2001.7
Reaction of tetracyanoethylene with α,β-unsaturated ketones was investigated. 3-R1-4-R2-6-R3-5-oxo-1,1,2,2-cyclohexanetetracarbonitriles, unsaturated tetracyanoalkanones, 3-R-5,5-dihydroxy-1,1,2,2-cyclohexanetetracarbonitriles, 1,2,2-tricyano-3-R-5-oxo-1-cyclohexanecarboxamides, 3-R1-4-R2-8-R3-5-hydroxy-7-oxo-6-azabicyclo[3.2.1]octane-1,2,2-tricarbonitriles were synthesized.
A RuPHOX-Ru catalyzed selective asymmetrichydrogenation of exocyclic α,β-unsaturated ketones has been developed, furnishing the corresponding chiral exocyclic allylic alcohols in high yields and with up to >99.5% ee. The reaction could be performed on a gram scale with a relatively low catalyst loading (up to 10000 S/C) without any loss in reaction activity and enantioselectivity. The resulting hydrogenated
已开发出RuPHOX-Ru催化的环外α,β-不饱和酮的选择性不对称氢化,可提供高收率和最高> 99.5%ee的相应手性环外烯丙基醇。该反应可以以克级进行,具有相对较低的催化剂负载量(最高10000 S / C),而没有任何反应活性和对映选择性的损失。所得的氢化产物可以容易地转化为具有高不对称性能的几种生物活性化合物。不对称方案为合成手性环外烯丙基醇提供了一种有效的方法。
Baeyer-Villiger Oxidation of β-Aryl Substituted Unsaturated Carbonyl Compounds with Hydrogen Peroxide and Catalytic Selenium Dioxide
作者:J. A. Guzmán、V. Mendoza、E. García、C. F. Garibay、L. Z. Olivares、L. A. Maldonado
DOI:10.1080/00397919508015893
日期:1995.7
Abstract A simple and cheap oxidative procedure using 30% H2O2 and catalytic SeO2 allows to transform 2-aralkylidenecycloalkanones and hydroxy- or alkoxybenzaldehydes to give, in high yields, enollactones and arylformates, respectively.
A greener approach for the synthesis of 1-N-methyl-(spiro[2.3′]oxindolespiro[3.2″]/spiro[2.3′]indan-1,3-dionespiro[2.2″])cyclopentanone-4-aryl pyrrolidines
作者:Gowri Sridhar、T. Gunasundari、R. Raghunathan
DOI:10.1016/j.tetlet.2006.11.002
日期:2007.1
N′-dimethyl carbamate (DIMCARB), a reusable reaction medium, has been used in the synthesis of a number of monoarylidene cyclopentanones. These compounds are used as dipolarophiles in the 1,3-dipolarcycloaddition reaction of an azomethineylide, generated in situ by the decarboxylation method for the synthesis of spiropyrrolidines by the application of microwave methodology.
Cup-shaped calix[4]arenes bearing one or two ketocyanine fluorophore fragments at the wide rim of the macrocycle are synthesized by condensation of formyl calix[4]arenes with arylmethylene(hetarylmethylene)cyclopentanones in the presence of the ionic liquid, dimethylammonium dimethylcarbamate (DIMCARB) and characterized using UV-vis and fluorescence spectroscopy. Strong positive solvatofluorochromism for the calixarene ketocyanines is observed. (C) 2011 Elsevier Ltd. All rights reserved.