Desthiobiotin: spot the wrong reaction class

Single question

Single-step closure of a vicinal diamine to the cyclic urea of desthiobiotin. The atoms balance and the product is right. Read the reaction class label.

Cyclic urea formation from a vicinal diamine plus phosgene equivalent

Distinguishing C-N bond formation from C-C coupling

Why Suzuki coupling cannot build a urea

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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