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Interpretation: A stepwise mechanism for the given reaction of benzaldehyde
Concept Introduction: Aldol reaction is the condensation reaction of the
The crossed aldol reaction takes place between the two different carbonyl compounds that is between two different
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CNCT ORG CHEM 6 2020
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- B-D-Glucose, a hemiacetal, can be converted to a mixture of acetals on treatment with CH,OH in the presence of acid. Draw a stepwise mechanism for this reaction. Explain why two acetals are formed from a single starting material. он он OH CH;OH, HCI HO Но HO HO но + Но + H20 OH OCH3 OH OHOCHS но B-D-glucosearrow_forwardDraw the hemiacetal and acetal formed when the carbonyl compound is treated with two equivalents of the given alcohol in the presence of H2SO4.arrow_forwardAnswer the following questions about curcumin, a yellow pigment isolated from turmeric, a tropical perennial in the ginger family and a principal ingredient in curry powder.a.In Chapter 11, we learned that most enols, compounds that contain a hydroxy group bonded to a C=C, are unstable and tautomerize to carbonyl groups. Draw the keto form of the enol of curcumin, and explain why the enol is more stable than many other enols. b.Explain why the enol O—H proton is more acidic than an alcohol O—H proton. c. Why is curcumin colored? d.Explain why curcumin is an antioxidant.arrow_forward
- Explain why ketone K undergoes aldol reactions but ketone J does not.arrow_forwardDraw a stepwise mechanism for the following reaction, one step in the synthesis of the cholesterol-lowering drug pitavastatin, marketed in Japan as a calcium salt under the name Livalo.arrow_forwardAspirin is an anti-inflammatory agent because it inhibits the conversion of arachidonic acid to prostaglandins by the transfer of its acetyl group (CH3CO−) to an OH group at the active site of an enzyme. This reaction, called transesterification, results in the conversion of one ester to another by a nucleophilic acyl substitution reaction. Draw a stepwise mechanism for the given transesterification.arrow_forward
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