中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
1,5-二甲基-1H-吡唑-4-羧酸 | 1,5-dimethyl-1H-pyrazole-4-carboxylic acid | 31728-75-3 | C6H8N2O2 | 140.142 |
Methods are described for the synthesis of 1,3-dimethyl-N-phenylpyrazole-4-carboxamid (3) and the isomeric 1,5-dimethyl compound (4), structural analogues of the systemic fungicide carboxin. Evidence confirming the structural assignment of the compounds is presented, and a convenient method for the removal of the amino group from some aminopyrazoles is described.