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. 2014 Sep 23;47(19):6572–6579. doi: 10.1021/ma5012039

Scheme 1. (a) Alternating Ring-Opening Metathesis (AROM-1) of 3 or 4 with Cyclohexene To Form BA Dimer and Proposed Intra- and Intermolecular Cross-Metathesis for (3-alt-6)1; (b) Double Alternating Ring-Opening Metathesis (AROM-2) To Form BA′BA Tetramer.

Scheme 1

Carbenes (circled) were monitored by 13C NMR spectroscopy (Figure 4).

The proton resonances monitored are colored red (Figure 5).