J. Barluenga et al., 1-IODOALKYNES CAN ALSO BE DIMERIZED - A NEW HEAD-TO-TAIL COUPLING, Angewandte Chemie, International Edition in English, 32(6), 1993, pp. 893-894
The catalytic and selective coupling of two molecules of 1-iodoacetyle
ne 1 provides the functionalized head-to-tail dimer 2. The catalyst or
source of ''I+'' is the iodonium salt [I(C5H5N)2]BF4.