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Gilchrist, T. L., Science of Synthesis, (2008) 43, 196.
The ene reaction between benzyne and alkenes bearing an allylic hydrogen atom (Scheme 53) competes significantly with the [2+2]-cycloaddition reaction. There is good evidence that the ene reaction is a concerted process.
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References
| [239] | Meeeeeeee, M. M.; Meeeee, M. M., Meeeeeeeeee Meee., (8888), 8888. |
| [240] | Meeeeee, M. M.; Meeeeeeeee, M.; Meeee, M. M.; Mee, M. M.; Meeee, M. M., M. Me. Meee. Mee., (8888) 888, 8888. |
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