We developed a Ni-catalyzed asymmetric reductive spirocyclization of 1,6-enynes with
o-haloaryl aldehydes. This approach provides an efficient method for the construction
of chiral spiroindanone pyrrolidine derivatives in good yields with excellent enantio-
and diastereoselectivity (up to 99% ee, >20:1 dr). This reaction does not require
pre-prepared organometallic reagents and exhibits excellent substrate compatibility.
Key words
nickel catalysis - enantioselectivity - reductive spirocyclization - 1,6-enynes -
spiroindanones