139193-48-9Relevant articles and documents
HIGH DIASTEREOFACIAL SELECTIVITY IN THE REACTION OF SILYL ENOL ETHERS WITH CHLOROSULFIDES
Iqbal, Javed,Shukla, Alka
, p. 8753 - 8766 (1991)
The chlorosulfides 1 or 2 react with silyl enol ethers in presence of anhydrous zinc bromide to give mainly the corresponding syn products 4 or 6 respectively.The high syn selectivity of thee reactions is explained by nucleophilic addition to a chelated chiral thionium ion.