Carbocations are crucial intermediates in many chemical reactions; hence, considerable effort has gone into investigating their structures and properties, for example, in superacids, in salts, or in the gas phase. However, studies of the vibrational structure of carbocations are not abundant, because their infrared spectra are difficult to obtain in superacids or salts (where furthermore the ca...

A series of new 5-allyl-6-benzylpyrimidin-4(3H)-ones bearing different substituents at the C-2 position of the pyrimidine core have been synthesized and evaluated for their in vitro activities against human immunodeficiency virus type 1 (HIV-1) in the human T-lymphotropic type (MT-4 cell cultures). The majority of the title compounds showed moderate to good activities against HIV-1. Amongst the...

Purified isothiocyanates from cruciferous plants (Brassicacea, Syn. Cruciferae) plants were evaluated against 15 isolates of methicillin-resistant S. aureus isolated from diabetic foot-ulcer patients aiming the study of the potential usage of allyl-isothiocyanate, benzyl-isothiocyanate and 2-phenylethyl-isothiocyanate against this important bacteria. Disc diffusion and minimum inhibitory concen...

The development of efficient Friedel-Crafts alkylations of arenes and heteroarenes using only catalytic amounts of a Lewis acid has gained much attention over the last decade. The new catalytic approaches described in this review are favoured over classical Friedel-Crafts conditions as benzyl-, propargyl- and allyl alcohols, or styrenes, can be used instead of toxic benzyl halides. Additionally...

Methyl (2), ethyl (3), propyl (4), butyl (5), allyl (6), benzyl (7), o-, m-, p-xylyl (8-10), and alpha-phenylethyl (11) derivatives of arabinofuranosyluracil (1) were synthesized and their pharmacological effects in mice were examined by using hypnotic activity and synergism with pentobarbital as indices for the CNS depressant effects. At a dose of 2.0 micromol/mouse by intracerebroventricular ...

New silver nanocomposites (AgNCs) based on copolymers of N-methyl-2-azanorbornene-5 (MAN), N-benzyl- 2-azanorbornene-5 (BAN), N-allyl-2-azanorbornene-5 (AAN) and N-(2-azanorbornene-5)methylacetate (MAAN) with N-vinylpyrrolidone (VP) have been developed. The reduction ions into nanoparticles was achieved using NaBH4 as reducing agent. UV- spectroscopy scanning electron microscopy techniques were...

The title compound, C(20)H(26)NO(2) (+)·Br(-), is an N-chiral quaternary ammonium salt synthesized from (2S*)-N-benzyl-N-methyl-tyrosine methyl ester. The dihedral angle between the phenyl ring and the benzene ring is 11.61 (19)°. In the crystal structure, the allyl group is disordered over two positions with site occupancy factors of ca 0.8 and 0.2. The bromide anion links to the quaternary am...

The integration of electro and bio-catalysis offers new ways making molecules under very mild, environmentally benign conditions. We show that TEMPO mediated electro-catalytic oxidation alcohols can be adapted to work in aqueous buffers, with minimal organic co-solvent, enabling biocatalytic reductive amination using the AdRedAm enzyme. combined process a approach amine alkylation native alcoho...

In the title compound, C13H10ClNOS2, the dihedral angle between the rhodanine (r.m.s. deviation = 0.008 Å) and 4-chloro-benzyl-idene rings is 1.79 (11)°. The allyl group attached to the N atom, which lies almost perpendicular to the rhodanine ring, is disordered over two orientations in a 0.519 (13):0.481 (13) ratio. A short intra-molecular C-H⋯S inter-action closes an S(6) ring. In the crystal...