Tributylphosphine
See also: triethylphosphine, trimethylphosphine, triphenylphosphine
Recent Literature
In an operationally simple, mild and efficient one-pot synthesis of 2H-indazoles
from commercially available reagents, ortho-imino-nitrobenzene substrates,
generated via condensation, undergo reductive cyclization promoted by tri-n-butylphosophine
to afford substituted 2H-indazoles. Various electronically diverse
ortho-nitrobenzaldehydes and aromatic as well as aliphatic amines were
examined.
N. E. Genung, L. Wei, G. E. Aspnes, Org. Lett., 2014,
16, 3114-3117.