{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Dolbier HW Solutions 427 - 521 CARBOXYLIC ACIDS f The...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
( f ) The carboxylic acid function plays no part in this reaction; free-radical addition of hydrogen bromide to the carbon carbon double bond occurs. Recall that hydrogen bromide adds to alkenes in the presence of peroxides with a regioselec- tivity opposite to that of Markovnikov s rule. 19.23 ( a ) The desired product and the starting material have the same carbon skeleton, and so all that is required is a series of functional group transformations. Recall that, as seen in Problem 19.17, a carboxylic acid may be prepared by oxidation of the corresponding primary alcohol. The needed alcohol is available from the appropriate alkene. ( b ) The target molecule contains one more carbon than the starting material, and so a carbon carbon bond-forming step is indicated. Two approaches are reasonable; one proceeds by way of nitrile formation and hydrolysis, the other by carboxylation of a Grignard reagent. In either case the key intermediate is 1-bromo-2-methylpropane.
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}