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Pyrazines substituted with amino acid esters.
| compound | amino acid ester |
yield (%) |
compound | amino acid ester |
yield (%) |
|---|---|---|---|---|---|
| 15{1} | 14{1} | 76 | 19{1} | 18{1} | 71 |
| 15{2} | 14{2} | 72 | 19{2} | 18{2} | 84 |
| 15{3} | 14{3} | 85 | 19{3} | 18{3} | 84 |
| 15{4} | 14{4} | 99 | 19{4} | 18{4} | 98 |
| 15{5} | 14{5} | 70 | 19{5} | 18{5} | 67 |
| 15{6} | 14{6} | 64 | 19{6} | 18{6} | 34 |
| 15{7} | 14{7} | 89 | 19{7} | 18{7} | ND |
ND; Yield was not determined and the member was used without purification
