Al. Braga et al., CATALYST-DEPENDENT SELECTIVE SYNTHESIS OF O S-ACETALS AND S/S-ACETALSFROM ENOL ETHERS/, Synthetic communications, 25(20), 1995, pp. 3155-3162
Enol ethers are reacted with mercaptanes to give the corresponding O/S
- or S/S-acetals in medium to high yield. Either product can be formed
selectivity depending on the acid catalyst and the reaction time appl
ied.