| 发明名称 |
PROCESS FOR THE PREPARATION OF POLYMORPHS OF IMIDACLOPRID |
| 摘要 |
A process for the preparation of a Form I crystalline polymorph of imidacloprid, including: (i) dissolving imidacloprid in an appropriate amount of aqueous solvent or mixture of solvents to obtain an aqueous solution; (ii) cooling the aqueous solution slowly, thereby forming crystals of polymorph Form I of imidacloprid; (iii) isolating the crystals. A process for the preparation of a Form II crystalline polymorph of imidacloprid , comprising: dissolving imidacloprid in an appropriate amount of non-aqueous solvent or mixture of non-aqueous solvents to obtain a non-aqueous solution; (ii) cooling the solution rapidly, thereby forming crystals of polymorph Form II of imidacloprid; (iii) isolating the crystals |
| 申请公布号 |
US2016060246(A1) |
申请公布日期 |
2016.03.03 |
| 申请号 |
US201514939033 |
申请日期 |
2015.11.12 |
| 申请人 |
ROTAM AGROCHEM INTERNATIONAL CO., LTD |
发明人 |
BRISTOW James Timothy;WU Yifan |
| 分类号 |
C07D401/06 |
主分类号 |
C07D401/06 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A process for the preparation of a Form I crystalline polymorph of imidacloprid, comprising:
(i) dissolving imidacloprid in an appropriate amount of aqueous solvent or mixture of solvents to obtain an aqueous solution; (ii) cooling the aqueous solution slowly, thereby forming crystals of polymorph Form I of imidacloprid; (iii) isolating the crystals. |
| 地址 |
Hong Kong CN |
