| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
|---|---|---|---|---|
| 5-碘-1-甲基-1H-吡唑-4-羧酸乙酯 | ethyl 5-iodo-1-methyl-1H-pyrazol-4-carboxylate | 754219-01-7 | C7H9IN2O2 | 280.065 |
| —— | 5-iodo-1-methyl-1H-pyrazole-4-carbaldehyde | 1346818-72-1 | C5H5IN2O | 236.012 |
Pd/C-mediated alkynylation of 5-iodo-pyrazole-4-carboxylic acid, involving the first regioselective construction of α-pyrone ring on a pyrazol moiety via tandem coupling–cyclization process, has been developed to afford pyrano[4,3-