Fig. 5: Mechanistic studies. | Nature Communications

Fig. 5: Mechanistic studies.

From: Enantioselective construction of cyclic quaternary stereocenters via dinuclear copper catalyzed asymmetric [3 + 2] propargylation/annulation

Fig. 5

a ESI-MS analysis of the reaction mixture under standard conditions. b Proposed transition state models. The blue shaded planes indicate the π-conjugated systems involved in the transition state geometry. c Surface distance projection maps of intermediates INT II and INT II’. d Proposed catalytic mechanism.

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