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Chapter 9: Q9-7P a (page 272)

How would you prepare the following carbonyl compounds starting from an alkyne (reddish brown Br)?

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01

Hydroboration – oxidation reaction

The hydroboration鈥搊xidation to the direct, mercury(II)-catalyzed hydration reaction. Direct hydration with aqueous acid and mercury(II) sulfate leads to a methyl ketone,

02

 Formation of compound a

Terminal alkyne undergoes two additions, giving a doubly hydroborated intermediate.

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Most popular questions from this chapter

Terminal alkynes react with and water to yield bromo ketones. For example:

Propose a mechanism for the reaction. To what reaction of alkenes is

the process analogous?

Each of the following syntheses requires more than one step. How

would you carry them out?

(a)

(b)

Arrange the carbocations below in order of increasing stability.

The following cycloalkyne is too unstable to exist. Explain

Give IUPAC names for the following compounds:
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