Jones Oxidation

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P. Bladon et al., J. Chem. Soc. 1951, 2402
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C. Djerassi et al., J. Org. Chem. 21, 1547(1956)
R. A. Epifanio et al., Tetrahedron Letters 29, 6403 (1988)
P. A. Evans et al., Synth. Comm. 26, 4685 (1996)
N.M. Allanson et al., Tetrahedron Letters 39, 1989 (1998)
Y. Watanabe et al., Tetrahedron Letters 40, 3411 (1999)