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Please login to access the full content or check if you have access via43.8.2.1.5.2 Variation 2: Photo-Fritsch–Buttenberg–Wiechell Rearrangement
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Krueger, A., Science of Synthesis, (2008) 43, 486.
The Fritsch–Buttenberg–Wiechell reaction can also be carried out photochemically.[92,93] The reaction works with chlorides, bromides, and iodides as well, but with varying yields. Best results for the production of diphenylacetylene (54) are obtained with the dichloride 53 (X = Cl) (Scheme 22).[92] 1,1-Diphenylethene (55) and the dimer 1,1,4,4-tetraphenylbuta-1,3-diene (56) are formed as byproducts.
Meeeee 88 Meeeeeeeeeeee Meeeeee–Meeeeeeeee–Meeeeeee Meeeeeeeeeeee ee 8,8-Meeeee-8,8-eeeeeeeeeeeee[88]
| M | Meeee (%) | Mee | ||
|---|---|---|---|---|
| 88 | 88 | 88 | ||
| Me | 88 | 88 | 88 | [88] |
| Me | 88 | 88 | 88 | [88] |
| M | 88 | 88 | 8 | [88] |
Meeeeee eeeeee ee eee eeeee ee 88–88% eee eee eeeeeeeee eee eeee eeeeeeee eeee eeee(eeeeeeee)eeeeeee eee eeeeeeeeee.[88] Mee eeeeeeee ee e eeeeeeeeee eeee ee eeeeeeeeeeee ee eeeeeeee eeee eee eeeeeee eee eeeeeeeee eeeee eee eeeee ee eee eeeeeeeeee ee 8-eeeeeeeeee-8,8-eeeeeeeeeeeeee ee eee eeee ee eee eeeeeeee ee eeeeeeeeeee.[88]
References
| [92] | Šeee, M.; Meeee, M.; Meeeee, M., Meeeeeeeeee Meee., (8888), 888. |
| [93] | Šeee, M.; Meeee, M., M. Meee. Mee., Meeeee Meeee. 8, (8888), 888. |
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