Deuterium or tritium labeling by ionic hydrogenation. A convenient route to specifically labeled dethiobiotin

1977 ◽  
Vol 42 (23) ◽  
pp. 3776-3778 ◽  
Author(s):  
Georges Guillerm ◽  
Francois Frappier ◽  
Jean-Claude Tabet ◽  
Andree Marquet
Keyword(s):  
Ionic Hydrogenation ◽  
Convenient Route ◽  
Tritium Labeling

scholarly journals Selective growth of Ti3+/TiO2/CNT and Ti3+/TiO2/C nanocomposite for enhanced visible-light utilization to degrade organic pollutants by lowering TiO2-bandgap

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jeasmin Akter ◽  
Md. Abu Hanif ◽  
Md. Akherul Islam ◽  
Kamal Prasad Sapkota ◽  
Jae Ryang Hahn
Keyword(s):  
Visible Light ◽  
Structural Integrity ◽  
Carbon Layer ◽  
Wide Bandgap ◽  
Blue Dye ◽  
X Ray Diffraction ◽  
Experimental Conditions ◽  
Excellent Photocatalytic Activity ◽  
Convenient Route ◽  
Walled Carbon Nanotubes

AbstractA convenient route was developed for the selective preparation of two stable nanocomposites, Ti3+/TiO2/CNT (labeled as TTOC-1 and TTOC-3) and Ti3+/TiO2/carbon layer (labeled as TTOC-2), from the same precursor by varying the amount of single-walled carbon nanotubes used in the synthesis. TiO2 is an effective photocatalyst; however, its wide bandgap limits its usefulness to the UV region. As a solution to this problem, our prepared nanocomposites exhibit a small bandgap and wide visible-light (VL) absorption because of the introduction of carbonaceous species and Ti3+ vacancies. The photocatalytic efficiency of the nanocomposites was examined via the degradation of methylene blue dye under VL. Excellent photocatalytic activity of 83%, 98%, and 93% was observed for TTOC-1, TTOC-2, and TTOC-3 nanocomposites within 25 min. In addition, the photocatalytic degradation efficiency of TTOC-2 toward methyl orange, phenol, rhodamine B, and congo red was 28%, 69%, 71%, and 91%, respectively, under similar experimental conditions after 25 min. Higher reusability and structural integrity of the as-synthesized photocatalyst were confirmed within five consecutive runs by photocatalytic test and X-ray diffraction analysis, respectively. The resulting nanocomposites provide new insights into the development of VL-active and stable photocatalysts with high efficiencies.

Porphyrin-Catalyzed Oxidation of N-Substituted Tetrahydroisoquinolines to Dihydroisoquinolones

Synlett ◽  
2021 ◽  
Author(s):  
Ao Li ◽  
Bin Pan ◽  
Mu Chao ◽  
Na Wang ◽  
Yu-Long Li ◽  
...  
Keyword(s):  
Visible Light ◽  
Room Temperature ◽  
Air Atmosphere ◽  
Wide Range ◽  
Convenient Route ◽  
Catalyzed Oxidation

A visible-light-induced direct α-oxygenation of N-substituted tetrahydroisoquinoline derivatives has been successfully developed. Metalloporphyrin (ZnTPP) has been identified as an effective and inexpensive photocatalyst for this transformation with a wide range of substrates. This protocol provides a convenient route to afford the desired products in moderate to good yields at room temperature under air atmosphere.

Organophosphorus Intermediates. X. The Synthesis and Properties of the 1,4-Dioxo-2,3,4a,5,6,7,8,8a-Octahydro-1-λ-5-Phosphinoline System

1987 ◽  
Vol 40 (8) ◽  
pp. 1353 ◽  
Author(s):  
N Franisal ◽  
MJ Gallagher
Keyword(s):  
Bicyclic Compound ◽  
Convenient Route

Addition of methyl 2-methoxycarbonylethylphosphinate to methyl cyclohexenoate followed by cyclization and hydrolysis affords a convenient route to the octahydrophosphinoline system. The reactions appear to be stereoselective and give predominantly the cis ring fused bicyclic compound. Stereochemistry is assigned largely on the basis of 13C n.m.r , spectra. Addition of methyl 2-methoxycarbonylethylphosphinate to cyclohex-2-enone and attempted cyclization of the resulting product is also reported.

The natBr(p,x)73,75Se nuclear processes: a convenient route for the production of radioselenium tracers relevant to amino acid labelling

2001 ◽  
Vol 54 (6) ◽  
pp. 905-913 ◽  
Author(s):  
Michael Faßbender ◽  
Dawid de Villiers ◽  
Meiring Nortier ◽  
Nico van der Walt
Keyword(s):  
Amino Acid ◽  
Convenient Route ◽  
Nuclear Processes
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