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Change in Z Selectivity Over Time
 | ||||||
|---|---|---|---|---|---|---|
| Ar | 20 min | 25 min | 30 min | 35 min | 40 min | Yield d |
 |
20:1 | 18:1 | 13:1 | 10:1 | 10:1 | 92 – 95 |
 |
>100:1c | 18:1 | 18:1 | 17:1 | 13:1 | 70 – 79 |
 |
28:1 | 28:1 | 27:1 | 26:1 | 25:1 | 84 – 89 |
Reported selectivities of crude reaction mixture.
i-BuOH used instead of MeOH
Reaction mixture contains <10% of alkyne.
Combined yileds of Z and E isomers.
