Chapter 3 Multiple Choice Questions

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. Which of the following statements best describes retrosynthesis?

The reaction conditions required to convert the product of a reaction back to the original starting materials correct incorrect

A strategy used to design a synthesis of a target molecule by working back from the target to simple starting materials correct incorrect

The design of a synthetic scheme using cheap, traditional reagents, rather than expensive modern reagents correct incorrect

The design of reaction conditions such that an equilibrium reaction is pushed towards the products rather than the starting materials. correct incorrect

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. Which of the following statements best describes a synthon?

A synthetic reagent used in a reaction correct incorrect

A key intermediate in a reaction sequence correct incorrect

A transition state involved in a reaction mechanism correct incorrect

A hypothetical structure that would result in a given reaction if it existed correct incorrect

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. Which of the following statements best describes a disconnection in retrosynthesis?

A disconnection involves a theoretical disconnection of a bond in a target structure in order to identify simpler structures that could be linked through the formation of that bond correct incorrect

A disconnection involves identifying stages where a bond is split in the corresponding synthesis. correct incorrect

A disconnection identifies retrosynthetic stages which would not be feasible in the corresponding synthesis correct incorrect

A disconnection describes the reaction conditions required to split a target structure into simpler molecules. correct incorrect

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. Which of the following synthons is an example of Umpulong ?

Structure A correct incorrect

Structure B correct incorrect

Structure C correct incorrect

Structure D correct incorrect

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. Which of the reagents (A-D) would react as if the following synthon was present?

Structure A correct incorrect

Structure B correct incorrect

Structure C correct incorrect

Structure D correct incorrect

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. Which of the synthons (A-D) represents the following reagent?

Synthon A correct incorrect

Synthon B correct incorrect

Synthon C correct incorrect

Synthon D correct incorrect

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. For the following structure, which of the disconnections (A-D) is likely to be the best option?

Disconnection a correct incorrect

Disconnection b correct incorrect

Disconnection c correct incorrect

Disconnection d correct incorrect

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. Carry out a retrosynthetic analysis of ropivacaine and identify which of the reagents (A-D) is least likely to be useful.

Structure A correct incorrect

Structure B correct incorrect

Structure C correct incorrect

Structure D correct incorrect

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. Which synthon (A-D) corresponds to the following reaction?

Synthon A correct incorrect

Synthon B correct incorrect

Synthon C correct incorrect

Synthon D correct incorrect

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. Which reaction would result in a structure having a cyclohexene such as the following as a molecular signature?

The Friedal Crafts alkylation correct incorrect

The Wittig reaction correct incorrect

The Diels Alder reaction correct incorrect

The Claisen reaction correct incorrect