A. Bottcher et al., Palladium-catalyzed coupling of alkynes with chloroformates to form alkynecarboxylic acid esters, J CHEM S P1, (24), 1999, pp. 3555-3556
The preparation of alkynecarboxylic acid esters, which are versatile buildi
ng blocks for the synthesis of heterocyclic compounds, is described by mean
s of the palladium-catalyzed coupling of alkynes with chloroformates for th
e first time.