The reason for obtaining cyclized products 25 and 28 in a 1:1 ratio is hypothesized as follows: oxidative addition of Pd(0) to the cyclization precursor 22 generates intermediates 23 and 26. Subsequently, these intermediates undergo migratory insertion, forming metallacycles 24 and 27. Due to negligible energy differences between the migratory insertion and the ensuing reductive elimination processes, cyclized products 25 and 28 are obtained as a 1:1 mixture. Interestingly, the cyclized products 25 and 28 are stable and can be separated via preparative thin layer chromatography (PTLC), without undergoing atropisomerization at room temperature. This stability is attributed to the significant rotational barrier of the atropisomeric axis, caused by the steric hindrance from the bulky TES group and the phenolic OMe group in cyclized products 25 and 28.