B. Gabriele et al., A SIMPLE CATALYTIC-SYSTEM FOR THE SUBSTITUTIVE CARBONYLATION OF ALLYLALCOHOLS TO BETA,GAMMA-UNSATURATED ACIDS OR ESTERS, Journal of molecular catalysis. A, Chemical, 111(1-2), 1996, pp. 43-48
Allyl alcohols can be efficiently carbonylated to beta,gamma-unsaturat
ed acids or esters in dimethylacetamide (DMA) or MeOH/DMA mixtures und
er relatively mild conditions (80 degrees C, 50-100 atm) using a simpl
e catalytic system consisting of palladium iodide in the presence of t
hiourea as ligand. In the case of but-2-ene-1,4-diol, selectivation to
methyl 5-hydroxypent-3-enoate, 3,6-dihydro-1,2-pyrone or dimethyl hex
-3-enedioate may be achieved.