A highly diastereoselective formal [3+2+1]-cycloaddition reaction that produces multi-functionalized bicyclic pyrazolidinone derivatives is achieved in moderate to high yield by Rh2(4S-MPPIM)4-catalyzed reaction of azomethine imines with two molecules of a diazo ketone.
Xinfang Xu, Xichen Xu, Peter Y Zavalij, Michael P Doyle. Dirhodium(II)-catalyzed formal [3+2+1]-annulation of azomethine imines with two molecules of a diazo ketone. Chemical communications (Cambridge, England). 2013 Apr 07;49(27):2762-4
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PMID: 23443271
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