Treatment of terminal and internal alkynes with diphenylphosphane in the presence of catalytic amounts of a base and cobalt(II) acetylacetonate affords, with perfect and universal syn selectivity, the (E)-alkenyldiphenylphosphane derivatives in good yield (see scheme, acac=acetylacetonate).
No takes yet. Share an insight, caveat, or question.
Ohmiya et al. (2005) studied this question.
Synapse has enriched 4 closely related papers on similar clinical questions. Consider them for comparative context: