260908

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Showing 1-9 of 9 results for "260908" within Papers

Density functional theory study of the FT-IR spectra of phthalimide and N-bromophthalimide.

V Krishnakumar et al.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 62(4-5), 918-925 (2005-06-14)

Fourier transform infrared (FT-IR) spectra of phthalimide and N-bromophthalimide have been recorded in the range of 4000-400 cm-1. With the hope of providing more and effective information on the fundamental vibrations, a normal coordinate analysis has been performed on phthalimide

N-bromoimide/DBU combination as a new strategy for intermolecular allylic amination.

Ying Wei et al.

Organic letters, 15(20), 5186-5189 (2013-10-10)

Allylic amination reactions of alkenes, with an NBP (N-bromophthalimide) or NBS (N-bromosuccinimide)/DBU combination, were developed, in which both internal and external nitrogen nucleophiles can be installed directly. Dual activation of NBS or NBP by DBU leads to more electrophilic bromine

Titrimetric determination of acetylenic hyponotics using organic brominating agents.

A el-Brashy et al.

Pharmaceutisch weekblad. Scientific edition, 10(2), 90-92 (1988-04-22)

A titrimetric method is described for the determination of three acetylenic hypnotics, namely ethchlorvynol, ethinamate, and methylpentynol carbamate, in bulk and in dosage forms. The method involves the use of either 1,3-dibromo-5,5-dimethylhydantoin (DBH), N-bromosuccinimide (NBS) or N-bromophthalimide (NBP) as titrants.

Titrimetric determination of para-aminobenzoic acid using N-bromophthalimide and N-bromosaccharin.

K G Kumar et al.

Journal of pharmaceutical and biomedical analysis, 7(5), 627-631 (1989-01-01)

C2-symmetric cyclic selenium-catalyzed enantioselective bromoaminocyclization.

Feng Chen et al.

Journal of the American Chemical Society, 135(4), 1232-1235 (2013-01-15)

A catalytic asymmetric bromocyclization of trisubstituted olefinic amides that uses a C(2)-symmetric mannitol-derived cyclic selenium catalyst and a stoichiometric amount of N-bromophthalimide is reported. The resulting enantioenriched pyrrolidine products, which contain two stereogenic centers, can undergo rearrangement to yield 2,3-disubstituted

Enantioselective synthesis of multisubstituted biaryl skeleton by chiral phosphoric acid catalyzed desymmetrization/kinetic resolution sequence.

Keiji Mori et al.

Journal of the American Chemical Society, 135(10), 3964-3970 (2013-02-19)

Described herein is the enantioselective synthesis of multisubstituted biaryl derivatives by chiral phosphoric acid catalyzed asymmetric bromination. Two asymmetric reactions (desymmetrization and kinetic resolution) proceeded successively to afford chiral biaryls in excellent enantioselectivities (up to 99% ee). Both experimental and

Colorimetric and titrimetric assay of isoniazid.

A M el-Brashy et al.

Journal of pharmaceutical and biomedical analysis, 10(6), 421-426 (1992-06-01)

Two methods are proposed for the determination of isoniazid in pure form or in tablets. In the first method chlorpromazine hydrochloride, when treated with 2-iodoxybenzoic acid as an oxidant in 50% w/v o-phosphoric acid solution, is oxidized to chlorpromazine free

Site-selective bromination of vancomycin.

Tejas P Pathak et al.

Journal of the American Chemical Society, 134(14), 6120-6123 (2012-04-03)

We report the site-selective bromination of vancomycin to produce, with substantial efficiency, previously unknown monobromovancomycins, a dibromovancomycin, and a tribromovancomycin. We document the inherent reactivity of native vancomycin toward N-bromophthalimide. We then demonstrate significant rate acceleration and perturbation of the

Titrimetric methods for the determination of some sulpha drugs using N-bromophthalimide and N-bromosaccharin.

K G Kumar et al.

The Analyst, 113(9), 1369-1372 (1988-09-01)

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