An Efficient and Convenient Synthesis of Imidazolines and Benzimidazoles via Oxidation of Carbon-Nitrogen Bond in Water Media

2012 ◽  
Vol 30 (4) ◽  
pp. 924-928 ◽  
Author(s):  
Kabeer A. Shaikh ◽  
Vishal A. Patil ◽  
Parveen A. Shaikh
Keyword(s):  
Convenient Synthesis ◽  
Water Media ◽  
Nitrogen Bond

Formation and Reactions of (1-Chloroalkyl)carbamoyl Chlorides. Synthesis of 1,2,4-Triazolidine-5-ones

1973 ◽  
Vol 51 (3) ◽  
pp. 333-337 ◽  
Author(s):  
Kinko Koyano ◽  
Colin R. McArthur
Keyword(s):  
Ring Closure ◽  
Convenient Synthesis ◽  
Effect Ring ◽  
Substituted Hydrazines ◽  
Nitrogen Bond

N-(α-Chlorobenzyl)carbaniloyl chloride and (α-chlorobenzyl)methylcarbamoyl chloride are formed by reaction of phosgene with N-benzylideneaniline and N-benzylidenemethylamine, respectively. Reaction of these carbamoyl chlorides with a number of nucleophiles is described, some of which cause cleavage of the benzyl to nitrogen bond while others give rise to substitution products without such cleavage. Of the latter type, substituted hydrazines react to effect ring closure to1,2,4-triazolidine-5-ones. The method serves as a convenient synthesis of these new heterocyclic systems.

scholarly journals Phosphine-promoted ring-opening of benzisothiazolinate ligands at a nickel(ii) centre: a convenient synthesis of Ni(ii)-thiolate complexes

2019 ◽  
Vol 48 (17) ◽  
pp. 5520-5522 ◽  
Author(s):  
Subhi A. Al-Jibori ◽  
Samer Hussein Ali ◽  
Ahmed S. Al-Janabi ◽  
Christoph Wagner ◽  
Graeme Hogarth
Keyword(s):  
Ring Opening ◽  
Thiolate Ligands ◽  
Convenient Synthesis ◽  
Bond Scission ◽  
Thiolate Complexes ◽  
Nitrogen Bond

Phosphines react with the benzisothiazolinate (bit) paddlewheel dimer, [Ni2(μ-bit)4·2H2O], resulting in sulfur–nitrogen bond scission and a series of unexpected transformations leading to novel Ni(ii) complexes containing 2-cyanophenylthiolate and related thiolate ligands.

Convenient Synthesis of (Z)-7- and (E)-9-dodecene-1-yl Acetate, Components of Some Lepidoptera Insect Sex Pheromone

2017 ◽  
Vol 68 (1) ◽  
pp. 180-185
Author(s):  
Adriana Maria Andreica ◽  
Lucia Gansca ◽  
Irina Ciotlaus ◽  
Ioan Oprean
Keyword(s):  
Sex Pheromone ◽  
Coupling Reaction ◽  
Coupling Scheme ◽  
Lithium Aluminium Hydride ◽  
Terminal Alkyne ◽  
Mercury Derivative ◽  
Lithium Aluminium ◽  
Convenient Synthesis ◽  
Practical Synthesis ◽  
Insect Sex

Were developed new and practical synthesis of (Z)-7-dodecene-1-yl acetate and (E)-9-dodecene-1-yl acetate. The routes involve, as the key step, the use of the mercury derivative of the terminal-alkyne w-functionalised as intermediate. The synthesis of (Z)-7-dodecene-1-yl acetate was based on a C6+C2=C8 and C8+C4=C12 coupling scheme, starting from 1,6-hexane-diol. The first coupling reaction took place between 1-tert-butoxy-6-bromo-hexane and lithium acetylide-ethylendiamine complex obtaining 1-tert-butoxy-oct-7-yne, which is transformed in di[tert-butoxy-oct-7-yne]mercury. The mercury derivative was directly lithiated and then alkylated with 1-bromobutane obtaining 1-tert-butoxy-dodec-7-yne. After acetylation and reduction with lithium aluminium hydride of 7-dodecyne-1-yl acetate gave (Z)-7-dodecene-1-yl acetate with 96 % purity. The synthesis of (E)-9-dodecene-1-yl acetate was based on a C8+C2=C10 and C10+C2=C12 coupling scheme, starting from 1,8-octane-diol. The first coupling reaction took place between 1-tert-butoxy-8-bromo-octane and lithium acetylide-ethylendiamine complex obtaining 1-tert-butoxy-dec-9-yne, which is transformed in di[tert-butoxy-dec-9-yne]mercury. The mercury derivative was directly lithiated and then alkylated with 1-bromoethane obtaining 1-tert-butoxy-dodec-9-yne. After reduction with lithium aluminium hydride of 1-tert-butoxy-(E)-9-dodecene and acetylation was obtained (E)-9-dodecene-1-yl acetate with 97 % purity.

Use of artificial wetland for the treatment of surface and wastewater

1996 ◽  
Vol 33 (4-5) ◽  
pp. 309-313
Author(s):  
Jan Šálek ◽  
František Marcián ◽  
Iman Elazizy
Keyword(s):  
Water Level ◽  
Root Zone ◽  
Artificial Wetland ◽  
Root Zones ◽  
Different Types ◽  
Water Media ◽  
Inlet Zone

Vegetative root zone methods are based on self-purifying processes that take place in the soil, wetland and vegetation containing water media. Our studies are concentrated on the course of puryfying in relation with the length of the filtration bed and on the progress of eliminating the ammoniacal pollution. The research proved that the essential part of the puryfying process takes place within the inlet zone (Figs 1 and 2). The decomposition of ammonia proceeds very slowly. The process of nitrification is affected by the lack of oxygen in the filtration media. To improve the effectiveness of vegetative root zone methods we suggest specific steps: an adjustment of the inlet zone, a system of cascades, a water level pulsation system and combinations of different types and arrangements of vegetative root zones.

A New and Convenient Synthesis of the Boceprevir P1 Fragment, ?-amino-?-Hydroxy Amide

2016 ◽  
Vol 13 (5) ◽  
pp. 352-358
Author(s):  
Jayaprakash Rao Yerrabelly ◽  
Pradeep Rebelli ◽  
Bharathi Kumari Yalamanchili ◽  
Venkat Reddy Ghojala
Keyword(s):  
Convenient Synthesis
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