Chapter 17: Q30P (page 885)
Show how you would use Suzuki reactions to synthesize these products from the indicated starting materials. You may use any additional reagents you need.

Short Answer


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Chapter 17: Q30P (page 885)
Show how you would use Suzuki reactions to synthesize these products from the indicated starting materials. You may use any additional reagents you need.



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Predict the major products of bromination of the following compounds, using Br2 and FeBr3 in the dark.
(a)

(b)

(c)

Triphenylmethanol is insoluble in water, but when it is treated with concentrated sulfuric acid, a bright yellow solution results. As this yellow solution is diluted with water, its color disappears and a precipitate of triphenylmethanol reappears. Suggest a structure for the bright yellow species, and explain this unusual behavior.
Phenolphthalein, a common nonprescription laxative, is also an acid-base indicator that is colorless in acid and red in base. Phenolphthalein is synthesized by the acid-catalyzed reaction of phthalic anhydride with 2 equivalents of phenol.
(a) Propose a mechanism for the synthesis of phenolphthalein.
(b) Propose a mechanism for the conversion of phenolphthalein to its red dianion in the base.
(c) Use resonance structures to show that the two phenolic oxygen atoms are equivalent (each with half a negative charge) in the red phenolphthalein dianion.

Phthalic anhydride Phenolphthalein red dianion
What products would you expect from the following reactions?

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