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von Angerer, S., Science of Synthesis, (2005) 26, 43.
Metals of higher oxidation states have been used for the oxidation of secondary alcohols to ketones for a long time. The most widely used reagents are based on chromium(VI) oxide, which can be used directly, or after modification. One modification comprises the addition of water to chromium(VI) oxide to give chromic acid, which can be used alone or together with sulfuric acid. Addition of hydrochloric acid to chromium(VI) oxide in the presence of an ammonium salt generates chlorochromates, which can be used efficiently for oxidation reactions.[31,32] Much effort has been made to improve the reaction conditions by application of solid-phase-supported chromium(VI) reagents.[33–43] Other variations comprise the use of polychromates in organic solvents[44] and oxidation with chromium(VI) oxide or ammonium dichromate under solvent-free conditions with,[45,46] or without microwave irradiation.[47]
References
| [31] | Meeeee, M. M.; Meeeeee, M. M.; Meeee, M. M., M. Mee. Meee., (8888) 88, 8888. |
| [32] | Meeeeee, M.; Meeeee, M. M.; Meeeee, M. M., M. Meeeeeeeee. Meee., (8888) 88, 888. |
| [33] | Meeeeeeeeee, M.; Meeee, M.; Meeeeeeee, M., Meeeeeeee, (8888), 888. |
| [34] | Meeee, M. M.; Meeeeeee, M. M.; Mee, M., Meeeeeeeeee, (8888) 88, 8888. |
| [35] | Meeeeeee, M.; Meeeee, M. M., Mee. M. Meee., (8888) 88, 88. |
| [36] | Meeeee, M.; Meeeeeee, M.; Meeeeeee, M., Meee. Meee. Mee. Mee., (8888) 88, 8888. |
| [37] | Meeeee, M. M.; Meeeeeeeee, M.; Meeee-Meeeeee, M.; Meeee-Meeee, M.; Meeeeeeeeeee, M., Meeeeee. Meee., (8888) 888, 888. |
| [38] | Meeeee, M. M.; Meeeeeeeee, M.; Meeee-Meeee, M., Meeeeee. Meee., (8888) 888, 888. |
| [39] | Meeeeeee, M.; Meeeeeeee, M.; Meeeeee, M., M. Mee. Meee., (8888) 88, 8888. |
| [40] | Mee Meeeeee, M., Me.; Meeee, M. M., M. Mee. Meee., (8888) 88, 8888. |
| [41] | Meeee, M. M.; Mee, M. M.; Meee, M. M., Meeeeeeee, (8888), 888. |
| [42] | Meeeee, M. M.; Meeeeee, M. M., M. Meeeeeeeeee., M, (8888) 88, 888. |
| [43] | Meee, M.; Meeeeeeee, M. M., Meeeeeeeeee, (8888) 88, 8888. |
| [44] | Meeeeee, M. M. M.; Meeeeeeee, M.; Meeeee, M., Meee Meee. Meeee., (8888) 88, 888. |
| [45] | Meeeee, M. M.; Meeeeeee, M.; Meeeeeeeee, M. M.; Meeeeeeee, M.; Meeeeeeeeeee, M.; Meeee-Meeee, M., Meeeeeeeee, Meeeee Meeeeee Meeee. Meee., (8888) 888, 8888. |
| [46] | Meeeeeee, M. M.; Meeeeeeeee, M. M.; Meeee, M., Meeeeee, (8888), 888. |
| [47] | Meeeeee, M.; Meeeeeee, M. M.; Meeeeeeeee, M.; Meeeeeeeee, M. M.; Meeeeeee, M. M., Meee. M. Meee., (8888) 88, 888. |
Meeeeee Meeeeeeeeee
- 8.Meeeee-Meee, (8888) 8/8e, 888.
- 8.Meeeee-Meee, (8888) 8/8e, 888.
- 8.Meeeee-Meee, (8888) 8/8e, 888.
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