Sequentially Formations of Csp3‐Csp2 and Csp2‐Csp2 Bonds by a One‐pot Reaction Involving N‐Tosylhydrazone and p‐Bromobenzeneboronic Acid

Abstract A one‐pot multi‐step reaction of two N ‐tosylhydrazones with p ‐bromobenzeneboronic acid was established. With the aid of sequentially formations of Csp 3 ‐Csp 2 bond and Csp 2 ‐Csp 2 bond, a series of 1‐benzyl‐4‐(1‐phenylvinyl)benzene derivatives can be synthesized from readily available starting materials in good yields. The transformation features a broad substrate scope and good functional group tolerance.