Synthesis of some mono

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Synthesis of some mono and dialkynyl derivatives containing thieno thiophene ring via sonogashira alkynylation reaction

The Sonogashira cross-coupling reactions were used to synthesize 5 new monoalkynyl derivatives (10a-e) and 2 dialkynyl derivatives (12a-b) containing thieno[3,2-b]thiophene from monoaryl thieno[3,2-b]thiophen in moderate yield. The procedure was optimized and triphenylphosphine (0.2 eq.), palladium diacetate (0.1 eq), copper (I) iodide (0.2 eq.), THF, iPr2NH were found to be the best in these cases. The structures of the (10a-e) and (12a-b) compounds were elucidated by 1H and 13C NMR and mass spectral analysis.

9p tieuthi3006 16-03-2018 26 1 Download

Doctoral dissertation: Improving the competition and business monopoly control policy in Vietnam in the context of international economic integration

Purpose of the study: On the basis of synthesis and clearer interpretation of the relationshipsbetween competition and monopoly, between competition policy and monopoly control one, in which competition and mono poly control law forms an important part of competition policy. In addition, based on the analysis results and situation assessment as well as reference to experience drawn from some countries in the world, and changes of the global environment;...

0p luanan014 19-07-2014 97 5 Download