Cobalt‐Catalyzed <i>Z</i>‐Selective Hydrosilylation of Terminal Alkynes
Wei Jie TeoDepartment of Chemistry National University of Singapore 3 Science Drive 3 117543 Singapore SingaporeChao WangDepartment of Chemistry National University of Singapore 3 Science Drive 3 117543 Singapore SingaporeYe TanDepartment of Chemistry National University of Singapore 3 Science Drive 3 117543 Singapore SingaporeShaozhong GeDepartment of Chemistry National University of Singapore 3 Science Drive 3 117543 Singapore Singapore
2017en
ABI
Abstract
Abstract A cobalt‐catalyzed Z ‐selective hydrosilylation of alkynes has been developed relying on catalysts generated from bench‐stable Co(OAc) 2 and pyridine‐2,6‐diimine (PDI) ligands. A variety of functionalized aromatic and aliphatic alkynes undergo this transformation, yielding Z ‐vinylsilanes in high yields with excellent selectivities ( Z / E ratio ranges from 90:10 to >99:1). The addition of a catalytic amount of phenol effectively suppressed the Z / E ‐isomerization of the Z ‐vinylsilanes that formed under catalytic conditions.
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