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Addition to a β-Substituted Acyclic Dienone: NHC–Cu Screeninga
| entry | imidazolinium salt | conv (%);b | Z:E b | erc |
|---|---|---|---|---|
| 1 | 6a | >98 | 91:9 | 95:5 |
| 2 | 6b | 77 | 80:20 | 83:17 |
| 3 | 9 | 81 | 93:7 | >99:1 |
Reactions performed under N2 atm.
Determined by analysis of 400 MHz 1H NMR spectra of unpurified mixtures (±2%).
Determined by HPLC analysis; er values correspond to Z alkene isomers. See the SI for details.
