# Are allylic three degree alcohols oxidized by the Jones' reagent via a classical carbocation intermediate?

I know the mechanism for Jones' oxidation is (picture from Organic Chemistry by Clayden):

and it proceeds through a chromate ester. And in general we understand that the Jones' reagent $\ce{H2CrO4}$ cannot oxidize three degree alcohols.

However, in my book, a question asked to oxidize the following three degree, allylic alcohol:

The solution proceeded via a carbocation intermediate to eventually form 3-methylcyclohex-2-en-1-one.

I wish to ask if this a correct solution. Does this reaction really occur? That too in the way it is described? If so, why isn't it described in any other book, even as an exceptional case? (Most other books simply accept that three degree alcohols cannot be oxidised) Or is this a by-product or a low-yield reaction?

Source: MS Chouhan; Advanced Problems In Organic Chemistry; 11th ed; Q19; Alcohols, Ethers, Epoxides

• Here is a study in the kinetics with $\ce{KMnO4}$. I can't think of a practical application off top of my head, I'd expect the reaction not to be very clean (the carboxylic acids/ketones formed can form enols themselves!). Also, the Baeyer-Villiger reaction is also an oxidation, but of course that's a different mechanism and off-topic (and well combustion is too, but even more off-topic). – ralk912 Mar 15 '18 at 7:44