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Title

Quinolinium bound chromium(VI) reagents for efficient electrophilic aromatic nitration and thiocyanation reactions using sodium nitrate and ammonium thiocyanate

نشریه آسیایی شیمی سبز، دوره: 3، شماره: 1
Year: 1396
COI: JR_AJGC-3-1_007
Language: EnglishView: 280
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Authors

Satish Babu Kodali - Department of Chemistry, Rayalaseema University, Kurnool-۵۱۸ ۰۰۷ (A.P.) India
Narendar Reddy Jakku - Department of Chemistry, Rayalaseema University, Kurnool-۵۱۸ ۰۰۷ (A.P.) India
CHinna Rajanna Kamatala - Department of Chemistry, Osmania University, Hyderabad-۵۰۰۰۰۷ (T.S.) India
Rajeshwar Rao Yerraguntla - Department of Chemistry, Govt. City College, Hyderabad-۵۰۰۰۰۲ (T.S.) India

Abstract:

Quinolinium dichromate (QDC) and quinolinium chlorochromate (QCC) were studied as efficient reagents for electrophilic aromatic nitration using sodium nitrite and thiocyanation by using ammonium thiocyanate under conventional, ultrasonic and solvent-free microwave assisted conditions. The microwave-assisted protocols exhibited remarkable rate acceleration and offered selective thiocyanation of the aromatic and heteroaromatic compounds with good yields. Addition of anionic (SDS) micelle to the reaction medium afforded considerable rate enhancements, while cationic (CTAB) and nonionic (Tx-100) micelles did not affect the rate noticeably. These protocols have were extended to regioselective thiocyanation of various aromatic compounds. Results were are completely similar to the nitration protocols. However, the reactions revealed comparatively shorter reaction times, and better yields in nitration reactions than in thiocyanation protocols. Catalytic effect of the SDS was attributed to the electrostatic stabilization of the cationic electrophile (NO2+ in nitration, and SCN+ in thiocyanation).

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This Paper COI Code is JR_AJGC-3-1_007. Also You can use the following address to link to this article. This link is permanent and is used as an article registration confirmation in the Civilica reference:

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Babu Kodali, Satish and Reddy Jakku, Narendar and Rajanna Kamatala, CHinna and Rao Yerraguntla, Rajeshwar,1396,Quinolinium bound chromium(VI) reagents for efficient electrophilic aromatic nitration and thiocyanation reactions using sodium nitrate and ammonium thiocyanate,https://civilica.com/doc/723261

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