Table 3.
Toluene (~0.004 M) reflux conditions to convert 10 to 1a.
| Entry | Conditions | Result |
| 1 | G-I (10 mol %), C2H4, 19 h | SMa recovered |
| 2 | G-II (10 mol %), Ti(OiPr)4, C2H4, 24 h | No productb |
| 3 | HG-IIc (10 mol %), Ti(OiPr)4, C2H4, 24 h | No productb |
aStarting material. bSM not recovered, cHoveyda–Blechert–Grubbs catalyst.