Journal of the Chemical Society. Perkin transactions I p. 67 - 74 (1993)
Update date:2022-07-30
Topics:
Fawcett, John
House, Stuart
Jenkins, Paul R.
Lawrence, Nicholas J.
Russell, David R.
A series of homochiral vinyl sulfoxides-synthesised by treating vinyl Grignard reagents with homochiral menthyl toluene-p-sulfinate or sulfinyl oxazolidinones 8a and 9a- were deprotonated with LDS and allowed to react with acetaldehyde, isobutyraldehyde, and trimethylacetaldehyde to give β-hydroxy sulfoxides with moderate diastereoselectivity.The sulfoxide 1 gave the best selectivity with the larger aldehydes.The same diastereoselectivity, within experimental error, is observed in the reactions with trimethylacetaldehyde of both E-1 and Z-1 giving 85:15 and 84:16 mixtures of 2c and 3c respectively; evidently, the geometry of the vinyl group does not affect the selectivity.
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