Asymmetric synthesis of α,α-dichlorosulphoxides from substituted thioacetates and sodium hypochlorite in β-cyclodextrin complexes
作者:K. Rama Rao、P. B. Sattur
DOI:10.1039/c39890000342
日期:——
The reaction of β-cyclodextrincomplexes of substitutedthioacetates (1) with sodiumhypochlorite in aqueous medium gives optically active α,α-dichlorosulphoxides (2) in good yields with an enantiomeric excess (e.e) of up to 53%.
Reaction of sulphoxides with (dichloroiodo)benzene or with bromine in the presence of pyridine affords the corresponding α-halogeno-sulphoxides. Some reactions of α-halogeno-sulphoxides are here described.
Sulfinoate compounds have the formula ##STR1## in which R and R.sub.1 are each haloalkyl having 1-4 carbon atoms. The compounds have utility as herbicidal antidotes for the protection of crops from thiocarbamate or trifluralin herbicidal injury.