References
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- Catalytic amount of 18-crown-6-ether accelerated the oxidation reaction: in the absence of 18-crown-6-ether, the same reaction resulted in lower yield of 4-tolylmethyl sulfoxide (30%, 4 h; cf. Table 1, Run 1, 82%).
- Adam , W. , Hass , W. and Sicker , G. 1984 . J. Am. Chem. Soc. , 106 : 5020
- If the oxidation proceeds via nucleophilic process by 2′, some what asymmetric oxidation could be expected.
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- Sawaki , Y. , Ishikawa , S. and Iwanura , H. 1987 . J. Am. Chem. Soc. , 109 : 584