Green+Synthesis+of+Fluorescent+Natural+Product+Lab+Report

Green Synthesis of Fluorescent Natural Product __Introduction__- Synthesis of 4-methylumbelliferone via the acid-catalyzed Pechmann condensation introduces students to several types of organic reactions: transesterification, electrophonic aromatic substitution, and alcohol dehydration. Performed with a recyclable, solid catalyst and under solvent-free conditions, the experiment illustrates many of the principles of green chemistry and additionally illustrates the potential of green chemistry to yield not only safety and environmental benefits, but positive economic impacts as well. With high regioselectivity, complex yet interpretable IR and, and unusual pH-dependent fluorescence, the synthesis of 4-methylumbelliferone provides a rich learning platform. __Procedure__- In a 50ml Erlenmeyer flask combine ethyl aceoactate (1.0ml, 7.8 mmol), resorcinol (.08 g, 7.3mmol) and Dowex 5W20 beads (1.0 g). In two additional 50ml erlenmeyer flask add 20ml water to one and 15ml ethanol (95%) to the other. Place all three flasks on a hot plate and set to level 5 occasionally stirring and swirling the mixtures until the substance stops bubbling and becomes a solid red matter. (20- 30 min) When reaction is complete add 2ml warm ethanol (95%) to dissolve the solid. Using a Pasteur Pipette, pipette the warm ethanol solution from the dowex beads into a clean Erlenmeyer flask. If necessary, repeat warm ethanol wash two to three more times to produce a greater yield. While heating the ethanol solution add hot water until the solution becomes cloudy and then allow ethanol solution to cool slowly to room temperature. Collect white to off white preciptate by the vacuum filtration and wash with distilled water. Allow substance to dry before taking a melting point and characterizing by IR spectrum. After samples have been measured and processed dissolve a small amount (20mg) of the product into 2-3ml of ethanol (95%) into three separate test tubes. Alter the pH of two of the test tubes by adding 2 ml of a 10% HCl solution into one tube and then adding 10%Na2CO3 to the other and place under a UV Lamp.

This report is very incomplete.Scores: format (0.5/2) style (0.5/2) data (0/3) quality of results, quality of data, conclusion, error....I can't score any of these with what you have here. I'll give you 4 points for starting, and for coming to lab (I know you were there).