ic0c00071_si_001.pdf (1.02 MB)
Vanadium Pyridonate Catalysts: Isolation of Intermediates in the Reductive Coupling of Alcohols
journal contribution
posted on 2020-03-28, 12:13 authored by Samuel E. Griffin, Laurel L. SchaferThe reductive coupling of alcohols
using vanadium pyridonate catalysts is reported. This attractive approach
for C(sp3)–C(sp3) bond formation uses
an oxophilic, earth-abundant metal for a catalytic deoxygenation reaction.
Several pyridonate complexes of vanadium were synthesized, giving
insight into the coordination chemistry of this understudied class
of compounds. Isolated intermediates provide experimental mechanistic
evidence that complements reported computational mechanistic proposals
for the reductive coupling of alcohols. In contrast to previous mononuclear
vanadium(V)/vanadium(III)/vanadium(IV) cycles, this pyridonate catalyst
system is proposed to proceed by a vanadium(III)/vanadium(IV) cycle
involving bimetallic intermediates.