Conformation and configurational assignment of cis and trans 3,4-dimethyl-6-t-butyl-5,6-dihydro-2H-thiopyran-S-oxides and S-methyl cations
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Add time:09/08/2019 Source:sciencedirect.com
The assignment of the cis and trans configuration of 3,4-dimethyl-6-t-butyl-5,6-dihydro-2H-thiopyran-S-oxides and S-Methyl cations is made by 13C and 17O NMR, and by force field calculations. It is shown that the preferred conformation of all compounds is the half chair and that a previous configurational assignment of the S-oxides should be reversed.
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