Question

can someone do 1-3?

Pechmann Condensation 1. Propose a mechanism for the acid-catalyzed Pechmann condensation of resorcinol and ethyl acetoacetate. Identify the transesterification, electrophilic aromatic substitution and dehydration steps. 2. Would you expect 1,3,5-trihydroxybenzene (phloroglucinol) to react more quickly or more slowly than resorcinol? Why or why not? 3. Consider and discuss the greenness of Pechmann Reaction. 4. Discuss and assign the peaks (chemical shift, splitting pattern, etc) in the 1H NMR and IR spectra of your product INDO,

Answer 1

2. It should undergo pachmann condensation more quickly, since it has three hydroxyl group this means that electrophilic aromatic substitution step should be faster, since OH an activating group

Transesterification: НОН -po-ope -ci-p Н,05 По о. ноолно Electrophilic aromatic substitution: Но,н нә0:5 нон ОН но оо номоо Нооло не Dehydration: НОН, LOH r :OH2 1 НОН, ном НО М о со HO :ОН, „ф -ф НО НО

3. He at the product formed 4-methylumbelliferone is in blue color in neutral medium, that's why the following reaction is green in color.