A general approach to medium ring alkynes by using metathesis of cobalt hexacarbonyl containing dienes.
The assembly of medium sized rings (7-9) was achieved by using the metathesis of dienes linked by a cobalt hexacarbonyl complexed alkyne with either Grubbs' or Schrock's catalysts. The products of metathesis were subjected to transformations involving the dicobalt hexacarbonyl complexes, for example, decomplexation to liberate cyclic alkynes or Pauson-Khand reaction.
Young
David G J
DG
Dabney-Buehler laboratories, The University of Tennessee, Knoxville, Knoxville Tennessee 37996, USA. dgjyoung@utk.edu
Burlison
Joseph A
JA
Peters
Ulf
U