Unintended Formation of a 26-Membered Cycle in the Course of a Novel Approach to Myricanol, a Strained [7,0]-Metacyclophane.

A convergent approach for the synthesis of (±)-myricanol, a strained diarylheptanoid isolated from Myricacae , was undertaken using a Suzuki–Miyaura coupling followed by a ring-closing metathesis (RCM). Herein, we report the unintentional formation of a 26-membered macrocycle as RCM product resulting from a head-to-tail dimerization of the seco -precursor, even in relay ring-closing metathesis (RRCM) conditions. [ABSTRACT FROM AUTHOR]