The present invention is directed to a process for the manufacture of 2-pentyn-1-ol starting from 2-propyn-1-ol via the following intermediates (I), (II) wherein R
1
is H or linear C
1-6
alkyl, R
2
is linear C
1-6
alkyl or branched C
3-6
alkyl and R
3
is linear C
1-6
alkyl, as well as to the intermediates themselves.
e under catalysis by PdCl2(PhCN)2. The same imines were formed almost quantitatively by noncatalyzed reaction of the azide with the corresponding vinylic ethers. The rate of the catalyzed reaction was found to be first order each in the allylic ether and in the azide. Easiness of the imine formation from the allylic ethers depended on the nature of azide, decreasing in the order of N3SO2Me>N3CO2Me>N3Ph
The present invention is directed to a process for the manufacture of 2-pentyn-1-ol starting from 2-propyn-1-ol via the following intermediates (I), (II) wherein R1 is H or linear C1-6 alkyl, R2 is linear C1-6 alkyl or branched C3-6 alkyl and R3 is linear C1-6 alkyl, as well as to the intermediates themselves.