Table 2. Assessment of forming 3a in 2-MeTHF and Gly when the order of addition of reagents is 2a then 1a a .
| |||
| Entry | Solvent | Time | Yield [%] |
| 1 | Gly | 10 s | 32 |
| 2 | 30 s | 3 | |
| 3 | 2-MeTHF | 1 min | 70 |
| 4 | 2 min | 62 | |
| 5 | 5 min | 42 | |
| 6 | 10 min | 13 | |
aReactions performed in air at ambient temperature using 1 g of solvent and 1 mmol of 1a. Lithium amide 2a was added as a 1 M soln. in 2-MeTHF and stirred for the specified time before addition of 1a. Reactions stirred for another 20 s, then quenched with sat. Rochelle's salt soln. (5 mL). Isolated yields are given.