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Search for "indium" in Full Text gives 83 result(s) in Beilstein Journal of Organic Chemistry.
Formation of epoxide-amine oligo-adducts as OH-functionalized initiators for the ring-opening polymerization of ε-caprolactone
Beilstein J. Org. Chem. 2010, 6, 938–944, doi:10.3762/bjoc.6.105
- a temperature range between −40 and 120 °C at a heating rate of 10 K min−1. For calibration, standard tin, indium and zinc samples were used. Three heating cycles were conducted. The glass-transition temperature (Tg) values are reported as the average of the second and the third heating cycle using
EPR and pulsed ENDOR study of intermediates from reactions of aromatic azides with group 13 metal trichlorides
Beilstein J. Org. Chem. 2010, 6, 713–725, doi:10.3762/bjoc.6.84
- , gallium and indium trichlorides with phenyl azides containing a variety of substituents. Analysis of the spectra showed that 4-methoxy-, 3-methoxy- and 2-methoxyphenyl azides all gave ‘dimer’ radical cations [ArNHC6H4NH2]+• and trimers [ArNHC6H4NHC6H4NH2]+• followed by polymers. 4-Azidobenzonitrile, with
- ; indium; Introduction The number of applications of indium [1][2][3][4][5][6], gallium [7][8][9][10][11] and other group 13 metal derivatives, as promoters of radical reactions, has been increasing ever since the original work of Baba and co-workers with dichloroindium hydride [12][13][14][15][16
- gallium, indium and aluminium. Results and Discussion Reaction of 4-methoxyphenyl azide (2) with group 13 metal chlorides A set of aromatic azides, each containing an electron-releasing or an electron-withdrawing substituent in the 4-position, was chosen for this study. The position of the substituent was
Poly(glycolide) multi-arm star polymers: Improved solubility via limited arm length
Beilstein J. Org. Chem. 2010, 6, No. 67, doi:10.3762/bjoc.6.67
- Perkin-Elmer 7 Series Thermal Analysis System with auto sampler in the temperature range from −40 to 230 °C at a heating rate of 20 K/min. The melting points of indium (Tm = 156.6 °C) and Millipore water (Tm = 0 °C) were used for calibration. Reagents Diglyme (99%) and glycidol (Sigma Aldrich) were
Self-assembled ordered structures in thin films of HAT5 discotic liquid crystal
Beilstein J. Org. Chem. 2010, 6, No. 51, doi:10.3762/bjoc.6.51
- between indium tin oxide (ITO)-coated glass plates at micrometer distance, very little is known about the organization of HAT5 in films of submicrometer thickness and their characteristics. Such films, produced by drop-casting and spin-coating, are the focus of this study. Results and Discussion Different
- on square glass substrates of 2.5 cm side length, coated with indium tin oxide (ITO). The deposition of the solution was performed by drop-casting or spin-coating, the latter at a speed of 500 rpm for 10 s. A starting concentration of 7.2 mg/ml was initially chosen to ensure a macroscopic coverage of
Synthesis of gem-difluoromethylenated analogues of boronolide
Beilstein J. Org. Chem. 2010, 6, No. 37, doi:10.3762/bjoc.6.37
- , Shanghai 200032, China 10.3762/bjoc.6.37 Abstract The straightforward synthesis of four gem-difluoromethylenated analogues 4–7 of boronolide is described. The key steps of the synthesis include the concise preparation of the key intermediates 12a–b through the indium-mediated gem-difluoropropargylation of
- could be obtained via an indium-mediated reaction of the fluorine-containing building block C and the protected aldehyde D, which in turn could be readily prepared by the reported procedure. Three chiral centres in our target molecules would be derived from D-glucono-δ-lactone, and the last one could be
- with compound 11 in the presence of indium with THF–H2O (1:4, v/v) as solvent smoothly gave the expected product 12a in 48% yield and 12b in 30% yield. More pleasing was the fact that the diastereomers 12a and 12b could be easily separated by silica gel chromatography. The assignment of the
Recent progress on the total synthesis of acetogenins from Annonaceae
Beilstein J. Org. Chem. 2008, 4, No. 48, doi:10.3762/bjoc.4.48
- lines (106 to nearly 1010 times the cytotoxic potency of the reference compound, adriamycin) [71]. In 1999, Marshall’s group reported the total synthesis of trilobin (Scheme 32) [87]. Addition of the γ-alkoxy allylic indium reagent derived from the (R)-α-OMOM allylic stannane 234 and InCl3 to aldehyde
A convenient allylsilane- N-acyliminium route toward indolizidine and quinolizidine alkaloids
Beilstein J. Org. Chem. 2007, 3, No. 32, doi:10.1186/1860-5397-3-32
- II The first steps of our synthesis were carried out as shown in Scheme 10. The starting material was 2-(2-hydroxyethyl)allylsilane 39 which was prepared in 86% yield by indium mediated allylsilylation of 3,4-dimethoxybenzaldehyde, as already described. [65] Condensation of alcohol 39 with
An efficient synthesis of novel pyrano[2,3-d]- and furopyrano[2,3-d]pyrimidines via indium- catalyzed multi- component domino reaction
Beilstein J. Org. Chem. 2006, 2, No. 11, doi:10.1186/1860-5397-2-11
- Knoevenagel/hetero-Diels-Alder reaction of 1,3-dimethyl barbituric acid with an aromatic aldehyde and ethyl vinyl ether/2,3-dihydrofuran in presence of 1 mol% of indium(III) chloride. The reaction also proceeds in aqueous media without using any catalyst, but the yield is comparatively less (65–70
- %). Introduction The emergence of indium(III) compounds as efficient Lewis acid catalysts presents new and exciting opportunities for organoindium chemistry. [1][2] It was found that the low reactivity of trivalent organoindium reagents can be increased by complex formation with organolithium compounds.[3] The
- tetra-organo-indates thus prepared are sufficiently reactive to take part in reactions at ambient temperature.[3] Moreover, indium metal[4] has been found to be an effective reducing agent and indium(III) halide or its complexes act[5] as an efficient, moisture compatable Lewis acid catalysts in
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