- Green synthesis of N-(2-hydroxyethyl)anilines by the selective alkylation reaction in H2O
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Based on our previous work, a safer and more sustainable protocol for the synthesis of N-(2-Hydroxyethyl)anilines has been developed. The synthesis included the selective alkylation reaction of aniline with 2-chloroethanol in H2O, eliminating the need for any catalysts and solvents during synthesis. Comparing with our previous work, the salient features of this methodology are eco-friendliness, economic benefit, and the ease of obtaining target compounds. The selective alkylation reaction in H2O is amenable to scale-up for the synthesis of N-(2-Hydroxyethyl)anilines.
- Guo, Hui,Hao, Jia,Sun, Tingting,Wang, Zuoyao,Cao, Jian,Zhang, Guobao
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- A method for the preparation of indole compounds and use thereof (by machine translation)
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A method for the preparation of indole compounds and its application, relates to the field of organic synthesis, the preparation method by aniline compound with ethylene oxide in the 1st under the action of catalyst reaction to obtain N - hydroxy ethyl aniline compound, then the N - hydroxy ethyl aniline compound with the aniline of the compounds in the 2nd reaction under the action of catalyst preparation indole compounds. The preparation method step is simple, requires only two-step reaction can efficiently yield to obtain the indole compound, its route is reasonable in design, simple steps, easy operation, low cost, and is suitable for industrial mass production. The preparation method is applied to the preparation of pharmaceutical in the indole structure, can improve the yield of the medicament, the medicine of the large-scale production. (by machine translation)
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Paragraph 0040-0044
(2018/04/01)
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- Palladium-catalyzed intramolecular carbene insertion into C(sp3)-H bonds
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A palladium-catalyzed carbene insertion into C(sp3)-H bonds leading to pyrrolidines was developed. The coupling reaction can be catalyzed by both Pd0 and PdII, is regioselective, and shows a broad functional group tolerance. This reaction is the first example of palladium-catalyzed C(sp3)-C(sp3) bond assembly starting from diazocarbonyl compounds. DFT calculations revealed that this direct C(sp3)-H bond functionalization reaction involves an unprecedented concerted metalation-deprotonation step. Pd in action: Palladium has been used to catalyze the C(sp3)-H insertion of metal carbenoids derived from α-diazoesters to form pyrrolidines through intramolecular assembly of C(sp3)-C(sp3) bonds. A reaction mechanism involving a metalation-deprotonation step instead of the usual concerted but asynchronous process is proposed.
- Solé, Daniel,Mariani, Francesco,Bennasar, M.-Llu?sa,Fernández, Israel
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supporting information
p. 6467 - 6470
(2016/06/01)
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- BmimOAc ionic liquid: A highly efficient catalyst for synthesis of 3-aryl-2-oxazolidinones by direct condensation of 2-(arylamino) alcohols with diethyl carbonate
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An efficient convenient procedure for the synthesis of 3-aryl-2-oxazolidinones from 2-(arylamino) alcohols and diethyl carbonate (DEC) catalyzed by ionic liquids is described. The effects of reaction time, amount of catalyst and temperature were investigated. Excellent yields of products were obtained under the optimized reaction conditions, when using BmimOAc as a catalyst. An intermediate ethyl 2-(phenyl amino) ethyl carbonate was isolated and characterized. 1H NMR spectroscopy and DFT calculations indicated that BmimOAc cooperatively activate the substrates through hydrogen bonding with its anion and cation sites. According to these results, a possible reaction mechanism was discussed.
- Elageed, Elnazeer H.M.,Wang, Binshen,Zhang, Yongya,Wu, Shi,Gao, Guohua
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p. 271 - 277
(2015/09/01)
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- Bis-aryl urea derivatives as potent and selective LIM kinase (Limk) inhibitors
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The discovery/optimization of bis-aryl ureas as Limk inhibitors to obtain high potency and selectivity and appropriate pharmacokinetic properties through systematic SAR studies is reported. Docking studies supported the observed SAR. Optimized Limk inhibitors had high biochemical potency (IC50 400-fold), potent inhibition of cofilin phosphorylation in A7r5, PC-3, and CEM-SS T cells (IC50 1 μM), and good in vitro and in vivo pharmacokinetic properties. In the profiling against a panel of 61 kinases, compound 18b at 1 μM inhibited only Limk1 and STK16 with ≥80% inhibition. Compounds 18b and 18f were highly efficient in inhibiting cell-invasion/migration in PC-3 cells. In addition, compound 18w was demonstrated to be effective on reducing intraocular pressure (IOP) on rat eyes. Taken together, these data demonstrated that we had developed a novel class of bis-aryl urea derived potent and selective Limk inhibitors.
- Yin, Yan,Zheng, Ke,Eid, Nibal,Howard, Shannon,Jeong, Ji-Hak,Yi, Fei,Guo, Jia,Park, Chul Min,Bibian, Mathieu,Wu, Weilin,Hernandez, Pamela,Park, Hajeung,Wu, Yuntao,Luo, Jun-Li,Lograsso, Philip V.,Feng, Yangbo
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p. 1846 - 1861
(2015/04/21)
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- Green and efficient protocol for the synthesis of N-(2-hydroxyethyl)anilines by the alkylation reaction in ionic liquid
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A green and efficient protocol for the synthesis of N-(2-hydroxyethyl)anilines by the selective alkylation reaction in ionic liquid [BMIM]BF4 (1-butyl-3-methylimidazolium tetrafluoroborate) has been developed, eliminating the need for toxic and expensive catalysts and volatile organic solvents. The effects of the amount of ionic liquid, temperature, time, and substrate structure on the reaction were investigated. The conversion and selectivity of N-(2-hydroxyethyl)anilines obtained in ionic liquid [BMIM]BF4 are significantly increased in comparison to those traditional methods. Furthermore, the ionic liquid could be easily separated and reused at least five times. It provided a simple and efficient alternative way for the industrial synthesis of N-(2-hydroxyethyl)anilines.
- Guo, Hui,Zhuang, Yuwei,Cao, Jian,Zhang, Guobao
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p. 3368 - 3374
(2014/12/10)
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- 1,3-Diphenyl-2-trichloromethyl-imidazolidines
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Compounds of the formula STR1 wherein R1 and R2 are each hydrogen, halogen or lower alkyl, attached to the 3-, 4- or 5-positions of the phenyl ring, R3 is halogen, lower alkyl or lower alkoxy, attached to the 3- or 4-position of the phenyl ring, and R4 is hydrogen, halogen or lower alkyl, attached to the 4- or 5-position of the phenyl ring; Provided, however, that the two phenyl moieties are other than both 4-chloro- or 4-methyl-substituted at the same time; the compounds are useful as insecticides and acaricides.
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