The product formed by the treatment of compound A with LDA followed by CH 3 CH 2 I is to be predicted. The multistep method for the conversion of A to B is to be devised. Concept introduction: Lithium diisopropylamide (LDA) is a sterically hindered strong base. In an unsymmetrical ketone, it abstracts hydrogen from least substituted carbon to form kinetic product. Alkylation of aldehydes and ketones takes place in the presence of a strong base. The use of appropriate base, solvent and temperature can yield one major product regioselectively. The first step is abstraction of proton and second step is attack of electrophile to form alkylated product.

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Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 23, Problem 23.67P

Interpretation Introduction

Interpretation: The product formed by the treatment of compound A with LDA followed by CH3CH2I is to be predicted. The multistep method for the conversion of A to B is to be devised.

Concept introduction: Lithium diisopropylamide (LDA) is a sterically hindered strong base. In an unsymmetrical ketone, it abstracts hydrogen from least substituted carbon to form kinetic product.

Alkylation of aldehydes and ketones takes place in the presence of a strong base. The use of appropriate base, solvent and temperature can yield one major product regioselectively. The first step is abstraction of proton and second step is attack of electrophile to form alkylated product.

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4. Choose the best reagent for carrying out the following reactions from the list below. Place the letter of the reagent(s) in the box over the reaction arrow. Use only one letter per box. OH 0 OH CH3 CH3 0 CH3 CH3 OH 賽 OCH3 H A. NaH, then CHI B. NaOCH 3, CH3OH C. m-CIC6H4CO3H D. E. warm H2SO4/H₂O F. G. H₂/Pd H. CH3MgBr in ether, then H3O+ Hg(O2CCF3)2, CH3OH PCC, CH2Cl2 I, Cl₂, H₂O J. LiAlH4 in ether, then H3O+ CH3

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く Predicting the pr Predict the major products of the following organic reaction: Δ Some important notes: • Draw the major product, or products, of the reaction in the drawing area below. • If there aren't any products, because no reaction will take place, check the box below the drawing area instead. • Be sure to use wedge and dash bonds when necessary, for example to distinguish between major products that are enantiomers. ? Click and drag to start drawing a structure.

Answer 2

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Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 23, Problem 23.67P

Interpretation Introduction

Interpretation: The product formed by the treatment of compound A with LDA followed by CH3CH2I is to be predicted. The multistep method for the conversion of A to B is to be devised.

Concept introduction: Lithium diisopropylamide (LDA) is a sterically hindered strong base. In an unsymmetrical ketone, it abstracts hydrogen from least substituted carbon to form kinetic product.

Alkylation of aldehydes and ketones takes place in the presence of a strong base. The use of appropriate base, solvent and temperature can yield one major product regioselectively. The first step is abstraction of proton and second step is attack of electrophile to form alkylated product.

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Answer 3

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Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 23, Problem 23.67P

Interpretation Introduction

Interpretation: The product formed by the treatment of compound A with LDA followed by CH3CH2I is to be predicted. The multistep method for the conversion of A to B is to be devised.

Concept introduction: Lithium diisopropylamide (LDA) is a sterically hindered strong base. In an unsymmetrical ketone, it abstracts hydrogen from least substituted carbon to form kinetic product.

Alkylation of aldehydes and ketones takes place in the presence of a strong base. The use of appropriate base, solvent and temperature can yield one major product regioselectively. The first step is abstraction of proton and second step is attack of electrophile to form alkylated product.

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Answer 4

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Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 23, Problem 23.67P

Interpretation Introduction