Alkynols HC=CCR2OH, HC=CCH2CH2OH and (E)-HC=CC(Me)=CHCH2OH react with
carboxylic acids in the presence of [Ru(mu-O2CR)(CO)2(PR3)]2 to select
ively afford keto esters or trisubstituted hydroxy dienyl esters, depe
nding on the possibility to give intramolecular transesterification. T
he potential of beta-oxopropyl esters as mild acylating reagents and p
recursors of hydroxy amides, dipeptides, pseudodipeptides, polycarbony
l compounds and acetylenic 1,2-diols has been shown.