A process for preparing 2-alkynoic esters of the general formula (I), R.sup.1 --O--CO--C.tbd.C--R.sup.2 (I) in which R.sup.1 and R.sup.2 independently are C.sub.1-16 -alkyl, C.sub.6-12 -aryl, C.sub.7-12 -aralkyl or C.sub.7-12 -alkylaryl radicals, and R.sup.2 can also be hydrogen, by reacting a chloroformate of the general formula (II), R.sup.1 --O--CO--Cl (II) with an alkyne of the general formula (III), R.sup.2 --C.tbd.C--H (III) is carried out in the presence of a Pt and/or Pd complex which has phosphine ligands and/or phosphite ligands as catalyst.
通用公式(I)的2-炔酸酯的制备方法,其中R.sup.1和R.sup.2独立地是C.sub.1-16-烷基,C.sub.6-12-芳基,C.sub.7-12-芳基烷基或C.sub.7-12-烷基芳基基团,而R.sup.2也可以是氢,通过将通用公式(II)的
氯甲酸酯,R.sup.1--O--CO--Cl(II),与通用公式(III)的
炔烃,R.sup.2--C.tbd.C--H(III),在具有
膦配体和/或
亚磷酸酯
配体的Pt和/或Pd络合物存在下反应而进行。