| 摘要 |
Process for preparing 2-alkyne 1-acetals of the general formula I, where the radicals have the following meanings: R<SUP>1 </SUP>is hydrogen, C<SUB>1</SUB>-C<SUB>20</SUB>-alkyl, C<SUB>2</SUB>-C<SUB>20</SUB>-alkenyl, C<SUB>2</SUB>-C<SUB>20</SUB>-alkynyl, C<SUB>3</SUB>-C<SUB>12</SUB>-cycloalkyl, C<SUB>4</SUB>-C<SUB>20</SUB>-cycloalkylalkyl, C<SUB>4</SUB>-C<SUB>10</SUB>-aryl, with these radicals optionally being able to be substituted by hydroxy, halogen, C<SUB>1</SUB>-C<SUB>6</SUB>-alkoxy, (C<SUB>1</SUB>-C<SUB>6</SUB>-alkoxy)carbonyl, carboxyl or nitrile groups, R<SUP>2 </SUP>is C<SUB>1</SUB>-C<SUB>6</SUB>-alkyl or a radical of the general formula II where R<SUP>1 </SUP>is as defined above, R<SUP>3 </SUP>has the same meaning as the radical R<SUP>2</SUP>, by electrochemically oxidizing a compound of the general formula III where the radical R<SUP>1 </SUP>has the same meaning as in the general formula I, in the presence of C<SUB>1</SUB>-C<SUB>6</SUB>-alkyl alcohols (alcohol A) or as such.
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