Table 3.
| |||
---|---|---|---|
compound | R | yielda (%) | purityb (%) |
5{46} | C6H5 | 69c | <90d |
5{47} | - | ||
5{48} | C6H5OMe-p | - | |
5{49} | C6H5 | 60c | <90d |
5{50} | 54 | 91 | |
5{51} | C6H5OMe-p | 64 | 95 |
Isolated yield after preparative HPLC.
UV purities determined at 214 nm after preparative HPLC.
Isolated yield after flash chromatography.
Purities determined by H1 NMR spectroscopy after flash chromatography.