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. Author manuscript; available in PMC: 2019 Jul 26.
Published in final edited form as: Angew Chem Int Ed Engl. 2018 Jul 4;57(31):9901–9905. doi: 10.1002/anie.201803872

Figure 3.

Figure 3.

Examples of dimerizations of ester-tethered triynes 12. [a] dr = 1:1. [b] a small amount of a regioisomer (see SI for 13i’) was observed (1H NMR analysis of the crude product mixture). [c] 140 °C, 48 h. [d] 150 °C, 24 h. TBS = tert-butyldimethylsilyl, TMS = trimethylsilyl, TIPS = triisopropylsilyl.