Distannadithiophenes and Their Application towards Hydroboration of Carbonyl Compounds

Abstract

Synthesis of distannadithiophenes (C6H6S)2Sn2Ar4) with different aryl substituents is presented. These air‐stable distannadithiophenes were tested as catalysts for the hydroboration of carbonyl compounds. Among the different distannadithiophenes tested, tetra‐tolyl distannadithiophene showed better catalytic activity over other compounds. A wide variety of aldehydes and ketones were reduced to their corresponding boronate esters using tetra‐tolyl distannadithiophene as a catalyst at room temperature.