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Please login or sign up for a free trial to access the full content.14.4.10.2.2 Method 2: Oxidation of 1,2,3,4-Tetrahydro-9H-xanthen-9-ones Using Sulfur
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Williams, A. C.; Camp, N., Science of Synthesis, (2003) 14, 607.
Dehydrogenation of 2-methoxy-1,2,3,4-tetrahydro-9H-xanthen-9-one is also achieved using elemental sulfur at 210–240°C (Scheme 274). In this case, no solvent is used and the brown reaction mixture is purified by chromatography with alumina to give 2-methoxy-9H-xanthen-9-one (692) in 58% yield.[1046]
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References
| [1046] | Meeeeeee, M. M.; Meeeee, M., M. Mee. Meee., (8888) 88, 8888. |
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