118220-81-8Relevant articles and documents
Chiral vinyl dioxazaborocines in synthesis: Asymmetric synthesis of 5- substituted Δ2-isoxazolines via nitrile oxide cycloaddition
Davies, Christopher D.,Marsden, Stephen P.,Stokes, Elaine S. E.
, p. 8513 - 8516 (1998)
Vinyl dioxazaborocines 1a-c have been subjected to 1,3-dipolar cycloadditions with benzonitrile oxide. The products are enantiomerically enriched 5-substituted Δ2-isoxazolines 2a-c.
A novel one-pot Reformatsky type reaction via bismuth salt in aqueous media
Shen, Zhen,Zhang, Jinqi,Zou, Huixian,Yang, Minmin
, p. 2733 - 2736 (1997)
In the presence of bismuth(III)chloride-metallic aluminum, α-halo carbonyl compounds react with aldehydes in water under mild conditions to give B-hydroxy carbonyl compounds with stereoselectivity in good yields.
Strong Lewis acid air-stable cationic titanocene perfluoroalkyl(aryl) sulfonate complexes as highly efficient and recyclable catalysts for C-C bond forming reactions
Li, Ningbo,Wang, Jinying,Zhang, Xiaohong,Qiu, Renhua,Wang, Xie,Chen, Jinyang,Yin, Shuang-Feng,Xu, Xinhua
supporting information, p. 11696 - 11708 (2014/07/22)
A series of strong Lewis acid air-stable titanocene perfluoroalkyl(aryl) sulfonate complexes Cp2Ti(OH2)2(OSO 2X)2·THF (X = C8F17, 1·THF; X = C4F9, 2·H2O· THF; X = C6F5, 3) were successfully synthesized by the treatment of Cp2TiCl2 with C8F 17SO3Ag, C4F9SO3Ag and C6F5SO3Ag, respectively. In contrast to well-known titanocene bis(triflate), these complexes showed no change in open air over three months. TG-DSC analysis showed that 1·THF, 2·H 2O·THF and 3 were thermally stable at 230 °C, 220°C and 280°C, respectively. Conductivity measurements showed that these complexes underwent ionic dissociation in CH3CN solution. X-ray analysis results confirmed that 2·H2O·THF and 3 were cationic. ESR spectra showed that the Lewis acidity of 1·THF (1.06 eV) was higher than that of Sc3+ (1.00 eV) and Y3+ (0.85 eV). UV/Vis spectra showed a significant red shift due to the strong complex formation between 10-methylacridone and 2·H2O·THF. Fluorescence spectra showed that the Lewis acidity of 2 (λem = 477 nm) was higher than that of Sc3+ (λem = 474 nm). These complexes showed high catalytic ability in various carbon-carbon bond forming reactions. Moreover, they show good reusability. Compared with 1·THF, 2·H2O·THF and 3 exhibit higher solubility and better catalytic activity, and will find broad applications in organic synthesis. This journal is the Partner Organisations 2014.
Aldol reactions of α-bromoalkyl phenyl ketones and aldehydes with tin(IV) iodide and tetrabutylammonium iodide
Masuyama, Yoshiro,Ohtsuka, Masaru,Kondo, Ayako
, p. 3346 - 3348 (2008/09/18)
Aldol reactions of α-bromoacetophenone and aldehydes in dichloromethane produced the corresponding E-α,β-unsaturated ketones at 25 °C with one equimolar amount of tin(IV) iodide, one equimolar amount of tetrabutylammonium iodide and one equimolar amount of N,N- diisopropylethylamine, and produced the corresponding β-hydroxy ketones at -80 °C with one equimolar amount of tin(IV) iodide and two equimolar amounts of tetrabutylammonium iodide. Using one equimolar amount of tin(IV) iodide and two equimolar amounts of tetrabutylammonium iodide at -80 °C in dichloromethane, α-bromopropiophenone reacted with aldehydes to afford the corresponding syn-α-methyl-β-hydroxy ketones selectively. Georg Thieme Verlag Stuttgart.
