- Sulfenylation of β-Diketones Using C- H Functionalization Strategy
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Sulfenylation of β-diketones is challenging as β-diketones undergo deacylation after sulfenylation in the reaction medium. The sulfenylation of β-diketones without deacylation under metal-free conditions at ambient temperature via a cross dehydrogenative coupling (CDC) strategy is reported. The resultant products can be further manipulated to form α,α-disubstituted β-diketones and pyrazoles.
- Varun, Begur Vasanthkumar,Gadde, Karthik,Prabhu, Kandikere Ramaiah
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p. 2944 - 2947
(2015/06/30)
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- Regioselective thiolation of arenes and heteroarenes: C-H functionalization strategy for C-S bond formation
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A facile transition-metal-free oxidative cross-dehydrogenative coupling reaction involving selective formation of a C-S bond leading to the synthesis of arylthiobenzoxazoles, heteroarylthiobenzoxazoles, and arylthiobenzothiazoles has been described. This highly regioselective C-H functionalization reaction with electron-rich aromatic systems including heteroaromatics is achieved by reversing the reactivity of sulfur in the presence of a suitable oxidant and strong acid. (Chemical Equation Presented).
- Varun, Begur Vasanthkumar,Prabhu, Kandikere Ramaiah
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supporting information
p. 9655 - 9668
(2015/01/16)
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- Chemical Interactions between 2-Mercaptobenzazoles and ?-Acceptors
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2-Mercaptobenzazoles (1a-c) interact with several ?-acceptors such as tetracyanoethylene (TCNE), 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ), 2,3,5,6-tetrachloro-1,4-benzoquinone (CHL), dicyanomethyleneindane-1,3-dione (CNIND), 2,3-dicyano-1,4-naphthoquinone (DCNQ), 9-dicyanomethylene-2,4,7-trinitrofluorene (DTF), and 2,3-dichloro-1,4-naphthoquinone (DCHNQ) via the formation of charge-transfer (CT) complexes to yield various heterocyclic compounds. - Keywords: 2-Mercaptobenzazoles; Molecular interactions; ?-Acceptors
- Hassan, A. A.,Mohamed, N. K.,El-Tamany, E. H.,Ali, B. A.,Mourad, A. E.
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p. 653 - 662
(2007/10/02)
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