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Enhanced Yield of 7- Hydroxy – 4-Methyl Coumarin ( Hymecromone) Assisted by Irradiations | ||
| Tikrit Journal of Pure Science | ||
| Article 1, Volume 15, Issue 2, 2010, Pages 69-71 | ||
| Authors | ||
| ; Q. Sa; | ||
| Abstract | ||
| Two independent irradiation techniques (as unconventional heating)were used to enhance the yield of 7- hydroxy – 4-methyl coumarin( Hymecromone) : microwave and ir lamp irradiations, together with conventional method. Highest yield (95%) was obtained with shorter reaction time(4 minutes ) using catalytic amount of sulfuric acid and magnesium sulfate (as conductive support) by the microwave irradiation, while the ir lamp irradiations gave low yield(50%)with long reaction time (8hours). | ||
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