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. 2023 Sep 25;145(39):21408–21418. doi: 10.1021/jacs.3c06691

Scheme 2. Extensions of the Bergman Cyclization to Functionalized 1,4-Pentadiynes by Kawatkar and Schreiner43 .

Scheme 2

Reproduced from ref (43). Copyright 2002 American Chemical Society.