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Filter the solid aspirin through a piece of pre-weighed filter paper using a Buchner funnel and the aspirator. It was found that this material could be reduced only after removal of the N-BOC group. Quirion, J. From 1H NMR the ratio of major to minor product was determined to be ca. Calculate the weight of your product by subtracting the weight of the paper and bag from the total.
Still in the hood, heat the mixture for about 10 min. Salicylic acid, whose name comes from Salix, the willow family of plants, was derived from willow bark extracts. We prepared the iodide 8 using classical chemistry, and began studies directed at joining this unit with dihydropyridine 7 to give dihydropyridone 6 on acidic workup. In folk medicine, willow bark teas were used as headache remedies and other tonics.
The success of this racemic synthesis will lead to the accomplishment of an asymmetric synthesis of - -perhydrohistrionicotoxin utilizing our asymmetric synthesis of 2,3-dihydropyridones.
Figure Treatment of ketal 24 with a catalytic amount of PPTS in aqueous acetone under reflux for 3 h produced two products. The corresponding energy consumed by each method of heating is tabulated below.
Be sure to wear gloves and safety goggles when using these chemicals. The energy consumed for the synthesis reaction. Be sure to record the filter paper weight in your notebook.