Question

Propose a detailed, step-by-step mechanism for the reaction pathway shown below:

I have the answer, but I do not understand as to the reasoning behind this. Since when can you break a single bond to form the large ring?

A better explanation would be helpful. Thank you!

CH2OH H2SO4 heat

17) OH2 OH H 1,2-shift 18)

CH2OH H2SO4 heat
17) OH2 OH H 1,2-shift 18)
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Answer #1

2. γ.ng bond is isshijt 6 2. S0ил ее 0H2 20 Scanned with CamScanner

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