当前位置:首页>南昌>南昌振禾 | 氟唑菌酰胺、氟吡菌酰胺、氟唑菌酰羟胺制剂研发进展

南昌振禾 | 氟唑菌酰胺、氟吡菌酰胺、氟唑菌酰羟胺制剂研发进展

  • 2026-05-07 13:40:58
南昌振禾 | 氟唑菌酰胺、氟吡菌酰胺、氟唑菌酰羟胺制剂研发进展
01

SDHI 类杀菌剂凭借高效、广谱、低抗性风险等优势,在全球植保市场占据重要地位。其中氟唑菌酰胺、氟吡菌酰胺、氟唑菌酰羟胺因分子结构特殊,制剂开发存在膏化、热储不稳、低温凝胶、结晶不均等行业共性难点。

我司长期聚焦该类产品制剂技术攻关,基于分子结构深度解析,针对性优化配方体系,现已取得一系列研发成果。

01

结构特点与制剂难点解析

1.氟唑菌酰胺的结构特点

氟唑菌酰胺结构式

氟唑菌酰胺(含三氟联苯基团)

‌强憎水性引发膏化风险‌,三氟联苯基团(-C₆H₂F₃-)赋予分子极高疏水性(log Kow=3.08,水溶性仅0.00388 g/L),研磨过程中原药颗粒表面易吸附空气形成气-液界面,导致悬浮剂发粘、膏化。

‌晶体表面能升高

刚性平面结构使晶体棱角尖锐,高表面能加剧颗粒间范德华力,需添加聚羧酸盐分散剂降低界面张力,抑制颗粒聚集。

‌三氟联苯基团增强热稳定性‌

含3',4',5'-三氟联苯基团,分子结构高度平面化,π-π堆叠作用强化晶体堆积密度,使其熔点达156.8℃(高于多数SDHI类杀菌剂),高温下不易分解。

‌刚性吡唑甲酰胺骨架限制分子运动‌

吡唑环与酰胺键形成共轭体系

分子内氢键网络(N-H···O=C)提升晶格能,在pH 4-9范围内水解稳定性高。

‌亲脂性导致光解风险‌

高log Kow值(3.08)增强脂溶性,但联苯结构在紫外光照下易发生C-F键均裂,需避光保存以维持稳定性。

2.氟吡菌酰胺的结构特点

氟吡菌酰胺结构式

氟吡菌酰胺(含双三氟甲基)

‌疏水屏障阻碍水分子渗透,‌苯环与吡啶环的双-CF₃基团(log Kow=3.3)形成强疏水层,使原药在研磨时释放油性杂质,引发相分离和膏化。‌低温凝胶化倾向‌高疏水性结合柔性桥链(-CH₂CH₂-),低温下水分子与氟原子形成弱氢键网络,促使悬浮剂凝胶化。

‌桥链杂环降低熔点和堆积密度‌

吡啶环与苯甲酰胺非共平面(二面角约30°),分子间作用力减弱,熔点降至118℃,但柔性桥链(-CH₂CH₂-)使其在酸碱环境中保持稳定(pH 5-9不水解)。

‌双三氟甲基提升疏水屏障‌苯环与吡啶环均含-CF₃基团,强疏水性(log Kow=3.3)形成分子“防水层”,抑制水分子渗透导致的晶型转变。

‌氯原子增加晶格缺陷风险‌

吡啶环3-位氯原子因空间位阻易在结晶过程中产生空位,需控制冷却速率避免多晶型问题。

3.氟唑菌酰羟胺的结构特点

氟唑菌酰羟胺结构式

氟唑菌酰羟胺(含二氟甲基)

‌适度亲水性缓解膏化‌,二氟甲基(-CHF₂)亲脂性较低(log Kow≈3.0),且N-甲氧基含亲水氧原子,削弱了整体憎水性,膏化风险显著低于前两者。‌卤键作用稳定分散体系‌,三氯苯基通过卤键与水分子竞争性结合,减少颗粒间水簇团形成,维持悬浮流动性。

‌N-甲氧基引入分子柔性‌

酰胺氮原子上甲氧基(-OCH₃)破坏平面性,分子内旋转自由度增加,致使其熔点未公开(推测低于150℃),但提升在极性溶剂中的溶解性。

‌手性中心影响结晶行为‌

含不对称碳原子(RS构型),外消旋混合物结晶时易形成混晶,需手性拆分或控制结晶条件保障制剂均一性。

‌三氯苯基增强热稳定性‌

2,4,6-三氯苯基的高卤素含量增强分子间卤键作用,补偿了柔性链的热不稳定性。
‌氟唑菌酰胺‌:刚性平面结构与强分子间作用保障高温及水解稳定性,但光敏感性需制剂优化。
‌氟吡菌酰胺‌:疏水屏障与酸碱稳定性突出,但结晶工艺需规避晶格缺陷。
‌氟唑菌酰羟胺‌:柔性结构牺牲了热稳定性,但手性控制和卤键设计可补偿能。
02

配方开发进展

从上面的结构分析,氟唑菌酰胺制剂开发难度远远高于另外两者,在实际实验中,情况确实如此,从我们开发的配方中选个有代表性的--40%氟唑菌酰胺·戊唑醇悬浮剂(10+30)为例:

  • 早期样品冷储变稠、热储 3 天即膏化;

  • 经配方优化后,54℃热储 14 天粒径基本不增长;

  • 热储转常温 14 天,仅少量结皮,无颗粒、无结底,分散状态良好。

我司通过分散体系优化、界面调控、结晶工艺控制,系统性解决了热储、冷储、分散、膏化等关键问题。

40%氟唑菌酰胺·戊唑醇悬浮剂

我们开发的情况:
20260321-4#R

20260321-4#L

💧54℃热储14天粒径基本不增长

03

目前已完成开发制剂配方

✔ 氟唑菌酰胺系列

✔ 氟吡菌酰胺系列

✔ 氟唑菌酰羟胺系列

更多优质制剂配方持续更新中!

欢迎业内同仁交流合作,携手共赢!

END

南昌振禾农药技术有限公司,致力于打造全方位农药研发一体化服务平台,业务包括:登记前咨询(从研发、剂型、市场前景角度评估可行性及风险);农药的研发服务即农化产品一站式研发试验服务(包括室内生测、田间探索、剂型研发、配方优化、生产工艺优化、田间应用推广等涉及新药研发的各个环节技术服务)。实验室和试验基地分布于南昌、合肥、云南、新疆等地,是中国此行业唯一的此类服务机构。

周先生 | 159 7905 2372

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  1. CONNECT:[ UseTime:0.000507s ] mysql:host=127.0.0.1;port=3306;dbname=aa460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000588s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.002935s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000297s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000629s ]
  6. SELECT * FROM `set` [ RunTime:0.001443s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000628s ]
  8. SELECT * FROM `article` WHERE `id` = 507261 LIMIT 1 [ RunTime:0.001534s ]
  9. UPDATE `article` SET `lasttime` = 1778159348 WHERE `id` = 507261 [ RunTime:0.002038s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000787s ]
  11. SELECT * FROM `article` WHERE `id` < 507261 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000439s ]
  12. SELECT * FROM `article` WHERE `id` > 507261 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000525s ]
  13. SELECT * FROM `article` WHERE `id` < 507261 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000827s ]
  14. SELECT * FROM `article` WHERE `id` < 507261 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002543s ]
  15. SELECT * FROM `article` WHERE `id` < 507261 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.005820s ]
0.100586s