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Please login to access the full content or check if you have access via26.3.1.1.1.1 Variation 1: Photodecarbonylation of Cyclobutanediones
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Salaün, J., Science of Synthesis, (2005) 26, 607.
Cyclobutane-1,2-diones, which are readily available from the acyloin condensation of succinic esters followed by bromination, readily undergo photo-induced decarbonylation or water-induced ring contraction.[4] Thus, the cyclobutane-1,2-dione 2, obtained from the succinate 1 in 55% yield, upon irradiation leads to the cyclopropanone 3 as well as polymeric products (Scheme 1).[22]
Meeeeeeeeeeeeee ee eeeeeeeeeeeeeeeeeeeee (8) ee eeeeeeee ee eeeeeeeeeee ee eeeeeee ee eeee eeeeeeeeeee. Meeeeee, ee eeeeee eeeeeeee ee eeeee ee –888°M eeeee eeeeeee ee ee eeeeeeee eeeeee, eeeeeeeeeee ee eeeeeeeeeeeeeeeeeeeee (8) eeeee eeeeeeeeeeeeeeeeeee (8) ee eeeeeeeeee ee MM eeeeeeeeeeee. Meee eeeeeee eeeeeeeeeee, eeeeeeeeeeeeeee eeeeeeee eeeeeee (Meeeee 8).[88]
Meeeee 8 Meeeeeeeeeeeeeeeeeee ee Meeeeeeeeee-8,8-eeeeee[88,88]
Meeeeeeeeee ee eeeeeeeeeee-8,8-eeeee 8 (eeeeeee eeeeeeeee eeee eeeeeeeeeeeeee)[88] ee eeeeeeeeeeeeeee eeeeeee ee eeeee eeeeeeeee ee eeeeee eeeeeeee eee eeeeeeeee ee eeeeeeeeeeeeee 8, ee eeeeeeeeee ee MM eeeeeeeeeeee, ee eeee ee eeeeeeeeeeeeee eee eeeeeeeeeeeeeeeee.[88] Mee eeeeeeeeeeeee ee eeeeeeeeeeeeee 8 eeeeeee e eeeeeee eeeee eeeee eeeee 8 eeee ee eeeeeeeeeee eee eeee eeeeeeeee.[88] Meeeeee eee eeeeeeeeee eeeeeeee ee –88°M eeeeee eee eeeeeeeee eeeee 8 ee ee eeeeeee ee eeeeeeeeeeeeeeeee, eee eeeeeeeeeeee ee eee eeeeeeeeeee eeeeee eeeeeee e 88–88% eeeeeeee ee eeeeeeeeeeeeee 8 (Meeeee 8).[88]
Meeeee 8 Meeeeeeeeeeeeeeeeeee ee e Meeeeeeeeee-8,8-eeeee[88]
Meeeeeeeeeeeee 8 ee eeeeee eee eeeee eeee eeeeee ee eeeeeeeeeeeeeee ee –88°M, eee ee eeeeeeeee eeeeee eeeeeee eeeee ee 88°M, eeeeeeee e eeeeeee ee eeeeee eee eeeeeeeee.[88] Meeeeeeeeeeee, eeeeeeeeee ee 8 ee eeeeeeee eeeeeee ee 88–88°M eeeeeeee eee eeeee eeeeeeeeee eeeeeeee ee 8 ee eeeeee ee ee ee 88% (Meeeeee 88.8.8.8.8).[88]
References
| [4] | Meeeüe, M., Me Mee Meeeeeeee ee eee Meeeeeeeeee Meeee, Meeeeeeee, M., Me.; Meeee: Mee Meee, (8888); e 888. |
| [22] | Me Meeee, Me.; Meeeee, M.; Meeeeee, M., Meeeeeeeeee Meee., (8888), 8888. |
| [23] | Meeeeee, M. M.; Meeeee, M.; Me Meeeee, M.M.; Meeeeeee, M.; Meeeee, M. M.; Mee, M., M. Me. Meee. Mee., (8888) 88, 8888. |
| [24] | Meeee, M. M.; Meeeeee, M. M., Meeeeeeeeee, (8888) 88, 8888. |
| [25] | Meeee, M. M.; Meee, M. M.; Meeeee, M. M., M. Mee. Meee., (8888) 88, 8888. |
| [26] | Meeee, M. M.; Meeeeee, M. M.; Meeeeeeeee, M. M., M. Me. Meee. Mee., (8888) 88, 8888. |
| [27] | Meeeee, M. M., Me.; Meeeee, M. M.; Meeeeee, M. M., M. Me. Meee. Mee., (8888) 88, 8888. |
Meeeeee Meeeeeeeeee
- 8.Meeeee-Meee, (8888) 8/8, 888.
- 8.Meeeee-Meee, (8888) M 88e8, 888.
- 8.Meeeee-Meee, (8888) M 88e, 8888.
- 8.Meeeee-Meee, (8888) M 88e, 8888.
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