O o oh ph o ph solutions for chapter 17 elimination

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Unformatted text preview: st a mechanism for this reaction and explain why the product is so stable. O O O H Ph OH Ph O Purpose of the problem Exploring what might happen on the way to an elimination and explaining special stability. Suggested solution The obvious place to start is cyclisation of the phenol onto a ketone to form a six- membered ring. The product is a hemiacetal that will surely eliminate by a combination of hemiacetal hydrolysis and the E1cB mechanism.. O O O O Ph ±H H OH OH O Ph O O OH2 Ph O H O Ph O Ph The final product is particularly stable as the right hand ring is aromatic. It has two alkene...
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