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. Author manuscript; available in PMC: 2012 Jun 1.
Published in final edited form as: Nat Chem. 2011 Nov 13;3(12):943–948. doi: 10.1038/nchem.1198

Figure 3. Experimental evidence, and proposed mechanism for the multi-component assembly.

Figure 3

a, Proposed mechanism for formation of 4 that also explains the reversible exchange of alcohols and aldehydes. b, A three-component assembly of 2-PA, DPA, and Zn(OTf)2 to form 2 with molecular sieves (bottom panel) upon addition of IPA and CEM-HCl led to the same complex 4 (top panel) as a four-component reaction. The arrows indicate that these peaks belong to the structures shown. c, ESI mass spectrum of IPA derived assembly. Peaks of 2, 3, and 4 were all observed with chloride as counter anion for 2 and 4.