Reaction of carboryne generated from 1-I-2-Li-1,2-C2B10H10 with styrene and its derivatives has been studied. In addition to [2+2] cycloaddition reaction and/or ene reaction, an extra-annular [4+2] cycloaddition reaction is also observed, depending upon the substituents on the vinyl unit. The re...

Poly(styrene-b-butadiene-b-styrene) triblock copolymer (SBS) crosslinked membranes containing poly(dimethylsiloxane-co-methylhydrosiloxane) (PDMS-co-PMHS) were prepared by hydrosilylation reaction toward CH4/N2 separation. The effect of an additive amount of PDMS-co-PMHS on the structure, morpho...

This work involves the preparation and characterization of poly(styrene-b-isoprene-b-styrene)-poly(dimethylsiloxane-co-methylhydrosiloxane) (SIS-c-PDMS-co-PMHS) crosslinked membranes towards CH4/N2 separation. SIS-c-PDMS-co-PMHS was synthesized via a simple hydrosilylation reaction with various ...

FTIR, FT-Raman, UV, NMR and quantum chemical calculation studies are performed on 5-chloro-2-nitroanisole, in order to gain the insights of its structural, spectroscopic and electronic properties (Fukui indices, HOMO and LUMO energy gap, MESP and Global reactivity descriptors). A complete vibrat...

Substituted benzenesulfonyl derivatives of m-aminovalerophenones bearing a 1,3,8-triazaspiro[4.5]decane-2,4-dione at the alkyl terminus are the first known, selective ligands for the 5-HT2C receptor. A brief structure-activity relationship of this series is outlined.

The 1,4-biradicals generated during the photolysis of γ-methyl valerophenone interact with oxygen at nearly diffusion controlled rates. The comparison of quantum yield studies in benzene with laser photolysis experiments in methanol allow the estimation of the biradical lifetime in benzene as 4...

Two temperature-sensitive model photochemical reactions, the Norrish Type II reaction and photochemical nucleophilic aromatic substitution on 4-nitroanisole by the hydroxide ion, carried out in high-temperature water (100–200 °C) in a pressurized vessel under microwave heating, are reported. T...

SummaryThe promoter region of the valerophenone synthase (VPS) gene was isolated from hop (Humulus lupulus). VPS, a member of the chalcone synthase (CHS) super-family, catalyzes the biosynthesis reaction of the hop resin that significantly accumulates in the cone's secretory gland called th...

Photoreactivity of valerophenone was investigated in frozen solid solvents: benzene, cyclohexane, t-butanol, hexadecane, and water. Different product and mass distributions were followed during the course of the photoreaction. It was evidenced that a portion of ketone molecules is almost unreact...

The rapid spread of Zika virus (ZIKV) in recent years has highlighted the severe diseases associated with ZIKV infection, such as Guillain-Barré syndrome in adults and microcephaly in newborns; yet no vaccines or antivirals currently exist to prevent or treat ZIKV infection. We and others have ...

Pentacene has been actively studied as relevant materials in organic field-effect transistors (OFETs) and organic light-emitting diodes (OLEDs). However, the low solubility and low stability of pentacene in common organic solvents have hindered its applications. When exposed to light or at high ...

The transient silenes (Me3Si)2SiCR1R2 (4: R1=H, R2=2-Me2N-5-Me–C6H3; 11: R1=Me, R2=2-Me2N–C6H4; 15: R1=3,5-Me2–C6H3, R2=2-Me2N–C6H4; 18: R1=Me, R2=2-Me2N-5-Me–C6H3) were generated following the mechanism of the sila-Peterson reaction. Thus, 4 was obtained by base-induced trimethylsilanol ...

A new nucleophilic difluoromethylenation of aldehydes and ketones using diethyl difluoro(trimethylsilyl)methylphosphonate (1) has been achieved. The reactive carbanion species were generated under mild reaction conditions with a catalytic amount of initiator. This methodology was compatible with...

Sulfated-zirconia is found to be a highly efficient heterogeneous solid catalyst in activating trimethylsilyl cyanide (TMSCN) for facile cyanosilylation of aldehydes. A unifying explanation is provided for the cyanosilylation reactions. The unique role of sulfated-zirconia consists of rendering ...

From gem-difluoromethyl group of 1,1,2,2-tetrafluoroethyl ether and 2,2-difluoroalkylamide, proton can be removed by potassium bis(trimethylsilyl)amide in DMF, THF or toluene. The generated nucleophiles are then condensed with benzophenones, benzaldehydes or Schiff's bases to provide new fl...

This work describes the organocatalytic α-trifluoromethylthiolation of silylenol ethers using N-(trifluoromethylthio)saccharin as trifluoromethylthiolating reagent that is activated by the presence of catalytic amounts of a Lewis base. Tetrahydrothiophene was identified as the best organocataly...

The reaction of enamines with 2 equiv of Et3Al and CH2I2 at room temperature in CH2Cl2 results in the formation of cyclopropyl amines in high yields (68–89%). Substituted 1-phenylcyclopropan-1-ols were also synthesized from trimethylsilyl enol ethers. The paper demonstrates the advantage of usi...

Methanesulfonic acid/phosphorus oxychloride (MAPO) was found to be a new effecient reagent in the Fries rearrangement of phenolic esters. Fries rearrangement of phenolic esters in the presence of MAPO, gave acylaryl methane sulfonates as major products.

The opioid receptor binding affinities of N-methyl- and N-phenethyl-5-phenylmorphans with a meta-hydroxy substituent [3-(2-methyl-2-azabicyclo[3.3.1]non-5-yl)-phenol (1a), and 3-(2-phenethyl-2-azabicyclo[3.3.1]non-5-yl)-phenol (1b)] were compared with the affinities of four new ligands bearing a...

Artemisia campestris subsp. maritima, locally named as “T’gouft” is used as decoction for its anti-inflammatory, antirheumatic, antivenom and antibacterial activities. An efficient and fast technique has been achieved for the screening of the major phenolics in methanolic crude extract (MCE) ...