Aa. Quntar et M. Srebnik, cis-vinylphosphonates and 1,3-butadienylphosphonates by zirconation of 1-alkynylphosphonates, ORG LETT, 3(9), 2001, pp. 1379-1381
[GRAPHICS]
Addition of "zirconocene" to 1-alkynylphosphonates gives three-membered zir
conacylces that can be hydrolyzed to cis-vinylphosphonates or further react
ed with alkynes/hydrolysis to give substituted (Z,E)- and (E,E)-1,3-butadie
nylphosphonates.