Method | Precursor 18 | Solvent (1 mL) | Yield |
[5] | 16.2 mg | DMSO | 29% |
[8] | 12.0 mg | DMF | 28% |
[6] | 10.0 mg | CH3CN | 29% |
Current | 5.0 mg | CH3CN | 38% |