tert-Butyl chloride: spot the wrong reaction class

Single question

One-step route to tert-butyl chloride from tert-butanol with DIAD, PPh3, and HCl, drawn as a Mitsunobu. The atoms balance and the product is right. Read the reaction class label.

Mitsunobu reaction scope (works on 1 and 2 alcohols)

SN1 substitution at tertiary alcohols with HCl

Why steric crowding blocks Mitsunobu at tertiary centers

Find the flaw

Click the step that contains the flaw, or pick “No flaw” if you think every step is correct.

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