Which of the following sequence of reactions would
convert tertiary butyl alcohol into 3,3-dimethylbutan-1-ol?
The substrate is a tertiary alcohol with exactly 4 carbons whereas the required product is a primary alcohol but with 4 + 2 = 6 carbon atoms - 3,3-dimethylbutan-1-ol.
Somehow, two more carbon atoms need to be added; one of the ways is via a Grignard synthesis using ring opening of oxirane: