CN113264875A - 一种氟啶虫酰胺的合成方法 - Google Patents
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- RLQJEEJISHYWON-UHFFFAOYSA-N flonicamid Chemical compound FC(F)(F)C1=CC=NC=C1C(=O)NCC#N RLQJEEJISHYWON-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 239000005900 Flonicamid Substances 0.000 title claims abstract description 30
- 238000001308 synthesis method Methods 0.000 title description 3
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- 238000000034 method Methods 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims abstract description 27
- XFKYKTBPRBZDFG-UHFFFAOYSA-N 2-aminoacetonitrile;hydrochloride Chemical compound Cl.NCC#N XFKYKTBPRBZDFG-UHFFFAOYSA-N 0.000 claims abstract description 18
- LMRJHNFECNKDKH-UHFFFAOYSA-N 4-(trifluoromethyl)nicotinic acid Chemical compound OC(=O)C1=CN=CC=C1C(F)(F)F LMRJHNFECNKDKH-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000001035 drying Methods 0.000 claims abstract description 9
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- 238000010992 reflux Methods 0.000 claims abstract description 8
- 238000010189 synthetic method Methods 0.000 claims abstract description 5
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical group [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 14
- QARBMVPHQWIHKH-UHFFFAOYSA-N methanesulfonyl chloride Chemical group CS(Cl)(=O)=O QARBMVPHQWIHKH-UHFFFAOYSA-N 0.000 claims description 12
- 239000002253 acid Substances 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 239000011230 binding agent Substances 0.000 claims description 9
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 7
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 7
- 239000003960 organic solvent Substances 0.000 claims description 6
- 239000003444 phase transfer catalyst Substances 0.000 claims description 6
- 150000008064 anhydrides Chemical class 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 5
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 150000007529 inorganic bases Chemical class 0.000 claims description 3
- WSLDOOZREJYCGB-UHFFFAOYSA-N 1,2-Dichloroethane Chemical compound ClCCCl WSLDOOZREJYCGB-UHFFFAOYSA-N 0.000 claims description 2
- 229910000028 potassium bicarbonate Inorganic materials 0.000 claims description 2
- 235000015497 potassium bicarbonate Nutrition 0.000 claims description 2
- 239000011736 potassium bicarbonate Substances 0.000 claims description 2
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 claims description 2
- 230000002194 synthesizing effect Effects 0.000 claims 7
- 239000003513 alkali Substances 0.000 claims 1
- 239000000047 product Substances 0.000 abstract description 17
- 239000013078 crystal Substances 0.000 abstract description 4
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- 238000003786 synthesis reaction Methods 0.000 abstract description 2
- 230000003197 catalytic effect Effects 0.000 abstract 1
- HTZCNXWZYVXIMZ-UHFFFAOYSA-M benzyl(triethyl)azanium;chloride Chemical compound [Cl-].CC[N+](CC)(CC)CC1=CC=CC=C1 HTZCNXWZYVXIMZ-UHFFFAOYSA-M 0.000 description 12
- 239000000203 mixture Substances 0.000 description 8
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- GFZMFCVDDFHSJK-UHFFFAOYSA-N 2-(methylideneamino)acetonitrile Chemical compound C=NCC#N GFZMFCVDDFHSJK-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 150000001263 acyl chlorides Chemical class 0.000 description 2
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- 239000012452 mother liquor Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 241000238631 Hexapoda Species 0.000 description 1
- 239000012359 Methanesulfonyl chloride Substances 0.000 description 1
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- 239000012295 chemical reaction liquid Substances 0.000 description 1
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- 239000000575 pesticide Substances 0.000 description 1
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- IBBMAWULFFBRKK-UHFFFAOYSA-N picolinamide Chemical compound NC(=O)C1=CC=CC=N1 IBBMAWULFFBRKK-UHFFFAOYSA-N 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
- C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
- C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D213/78—Carbon atoms having three bonds to hetero atoms, with at the most one bond to halogen, e.g. ester or nitrile radicals
- C07D213/81—Amides; Imides
- C07D213/82—Amides; Imides in position 3
Abstract
本发明公开了一种氟啶虫酰胺的合成方法,属于有机合成技术领域。将4‑三氟甲基烟酸与氨基乙腈盐酸盐在混合催化体系存在下,二氯甲烷和水混合体系中回流反应,加水析晶后过滤,烘干后得到白色晶体氟啶虫酰胺产品,纯度可达99.0%以上,干燥密封储存。本发明路线操作简单,反应副产物少,产品纯度高,成本较低,在市场上具有较大的竞争力。
Description
技术领域
本发明涉及一种氟啶虫酰胺的合成方法,属于有机合成技术领域。
背景技术
氟啶虫酰胺,白色晶体,熔点:157-158℃,CAS为158062-67-0,分子式为C9H6F3N3O,是一种新型低毒吡啶酰胺类昆虫生长调节剂类杀虫剂。
现有技术方法,分为直接法和间接法,直接法是先把4-三氟甲基烟酸做成酰氯,再与氨基乙腈盐酸盐反应。该方法收率较低,产品提纯困难;间接法也为先合成酰氯,再与亚甲氨基乙腈反应,再经过多步反应之后得到氟啶虫酰胺。然而上述两种方法收率都较低,污染较大,步骤长工艺复杂,且产品纯度低,提纯困难。
因此,为了达到节省步骤、节约成本和提高收率的目的,需要开发新合成方法。
发明内容
为了克服上述技术缺陷,本发明提供了一种氟啶虫酰胺的合成方法。本发明采用混合酸酐法,原理为4-三氟甲基烟酸与甲基磺酰氯形成羧酸-磺酸酐,该物种活性较高,直接与氨基乙腈盐酸盐即可生成氟啶虫酰胺。
为了实现上述目的,本发明所述一种氟啶虫酰胺的合成方法,采用如下技术方案,包括如下操作:将4-三氟甲基烟酸和氨基乙腈盐酸盐,在缩合剂、缚酸剂和相转移催化剂存在下,有机溶剂中升温回流反应,反应结束后过滤烘干,得到氟啶虫酰胺产品。
进一步地,在上述技术方案中,所述缩合剂为甲基磺酰氯,过程为4-三氟甲基烟酸与甲基磺酰氯先形成活性较高的羧酸-磺酸混合酸酐,再与氨基乙腈盐酸盐发生反应形成氟啶虫酰胺。
进一步地,在上述技术方案中,所述有机溶剂为二氯甲烷、氯仿或1,2-二氯乙烷。
进一步地,在上述技术方案中,所述缚酸剂为无机碱。无机碱优选自碳酸氢钠或碳酸氢钾。
进一步地,在上述技术方案中,所述在升温之前,先加入少量水,溶解部分缚酸剂,在相转移催化剂作用下吸收反应产生的水,促进反应正向进行。
进一步地,在上述技术方案中,所述反应操作为,将4-三氟甲基烟酸和有机溶剂混合,接着加入缚酸剂和缩合剂,低温下滴加缩合剂后,再加入氨基乙腈盐酸盐,最后加入水,升温至回流反应。
进一步地,在上述技术方案中,所述4-三氟甲基烟酸、氨基乙腈盐酸盐、缩合剂、缚酸剂与相转移催化剂摩尔比为1:1-1.3:1-1.3:3-3.5:0.1-0.2。
本发明所述技术方案典型操作如下:将4-三氟甲基烟酸和二氯甲烷的混合溶液中,加入碳酸氢钠和苄基三乙基氯化铵,低温下滴加甲基磺酰氯,加入氨基乙腈盐酸盐后滴加少量水,升温回流反应1h,滴加大量水析晶,降温搅拌1-2h,过滤得到湿品,烘干后到产品氟啶虫酰胺。
进一步地,在上述技术方案中,所述氟啶虫酰胺合格指标:白色固体粉末,纯度大于99.0%,水分低于0.5%,干燥密封阻聚剂保存。
发明有益效果
本发明采用4-三氟甲基烟酸与氨基乙腈盐酸盐在苄基三乙基氯化铵催化下反应,副产物和其他杂质可溶解在母液中除去。
本发明路线操作简单,反应副产物少,产品纯度高,成本较低,产品具有竞争优势。
具体实施方式
实施例1:
在反应瓶内,加入4-三氟甲基烟酸50g(0.261mol)、二氯甲烷250mL、碳酸氢钠76.7g(0.958mol)和5.9g苄基三乙基氯化铵(0.025mol)混合溶液,低温0℃滴加甲基磺酰氯38.8g(0.338mol),再加入氨基乙腈盐酸盐31.4g(0.339mol),再滴加50g水,升温至38-40℃下回流,中控显示反应完全(约1.5小时)后,滴加200mL水后降温至5℃搅拌1小时。过滤烘干得到56.5g产品氟啶虫酰胺,纯度99.2%,含水0.33%,收率95.2%。
注意事项
反应虽然为加水反应,但是在加氨基乙腈盐酸盐之前还是需要控制反应体系中的水分,否则会导致甲基磺酰氯和生成的混合酸酐被破坏,影响反应收率。
滴加甲基磺酰氯时需要控制温度不高于10℃,回流之前滴加水也需要控制温度,否则升温过快会导致提前引发反应,降低收率。
升温阶段,反应会产生大量二氧化碳气体,带动溶液暴沸,反应体系体积会膨胀,需要提高搅拌速度,开启放空,及时排出气体,放置溢料或者超压。当开始回流时,就不会再出现大量气体产生的现象。
反应时间不能太长,反应结束之后需及时后处理过滤。时间过长会使反应液颜色加深,产品着色效果加深,不容易洗去。母液也需要及时分出水相和有机相,分别处理。
淋洗湿品过程中,先用二氯甲烷将釜壁上残余的物料冲下淋洗,再用水淋洗,必须保证浸泡充分。
实施例2:
在500mL三口反应瓶内,加入4-三氟甲基烟酸20g(0.104mol)、二氯甲烷100mL、碳酸氢钠30.8g(0.385mol)和2.3g苄基三乙基氯化铵(0.01mol)混合,搅拌均匀,低温0℃滴加甲基磺酰氯15.5g(0.135mol),再加入氨基乙腈盐酸盐12.6g(0.135mol),再滴加20g水,升温至38-40℃下回流,中控显示反应完全(约1.5小时)后,滴加80mL水后降温至5℃搅拌1小时。过滤烘干得到22.5g产品氟啶虫酰胺,纯度99.5%,含水0.18%,收率93.7%。
实施例3:
在500mL三口反应瓶内,加入4-三氟甲基烟酸20g(0.104mol)、二氯甲烷100mL、碳酸氢钠30.8g(0.385mol)和1.2g苄基三乙基氯化铵(0.005mol)混合,搅拌均匀,低温0℃滴加甲基磺酰氯15.5g(0.135mol),再加入氨基乙腈盐酸盐10.7g(0.114mol),再滴加20g水,升温至38-40℃下回流,中控显示反应完全(约1.5小时)后,滴加80mL水后降温至5℃搅拌1小时。过滤烘干得到22.0g产品氟啶虫酰胺,纯度99.6%,含水0.22%,收率92.1%。
实施例4:
在50L夹套反应装置内,加入4-三氟甲基烟酸2.0kg(10.4mol)、二氯甲烷10L、碳酸氢钠3.08kg(38.5mol)和240g苄基三乙基氯化铵(1.0mol)混合,搅拌均匀,低温0℃滴加甲基磺酰氯1.56kg(13.6mol),再加入氨基乙腈盐酸盐10.7kg(11.5mol),再滴加2kg水,升温至38-40℃下回流,中控显示反应完全(约2.5小时)后,滴加8kg水后降温至5℃搅拌1.5小时。过滤烘干得到2.225kg产品氟啶虫酰胺,纯度99.4%,含水0.29%,收率95.7%。
以上实施例描述了本发明的基本原理、主要特征及优点。本行业的技术人员应该了解,本发明不受上述实施例的限制,上述实施例和说明书中描述的只是说明本发明的原理,在不脱离本发明原理的范围下,本发明还会有各种变化和改进,这些变化和改进均落入本发明保护的范围内。
Claims (8)
1.一种氟啶虫酰胺的合成方法,其特征在于,包括如下操作:将4-三氟甲基烟酸和氨基乙腈盐酸盐,在缩合剂、缚酸剂和相转移催化剂存在下,有机溶剂中升温回流反应,反应结束后过滤烘干,得到氟啶虫酰胺产品。
2.根据权利要求1所述氟啶虫酰胺的合成方法,其特征在于:所述缩合剂为甲基磺酰氯,过程为4-三氟甲基烟酸与甲基磺酰氯先形成活性较高的羧酸-磺酸混合酸酐,再与氨基乙腈盐酸盐发生反应形成氟啶虫酰胺。
3.根据权利要求1所述氟啶虫酰胺的合成方法,其特征在于:所述有机溶剂为二氯甲烷、氯仿或1,2-二氯乙烷。
4.根据权利要求1所述氟啶虫酰胺的合成方法,其特征在于:缚酸剂为无机碱。
5.根据权利要求4所述氟啶虫酰胺的合成方法,其特征在于:所述无机碱选自碳酸氢钠或碳酸氢钾。
6.根据权利要求1所述氟啶虫酰胺的合成方法,其特征在于:在升温之前,先加入少量水,溶解部分缚酸剂,在相转移催化剂作用下吸收反应产生的水,促进反应正向进行。
7.根据权利要求1所述氟啶虫酰胺的合成方法,其特征在于:反应操作为,将4-三氟甲基烟酸和有机溶剂混合,接着加入缚酸剂和缩合剂,低温下滴加缩合剂后,再加入氨基乙腈盐酸盐,最后加入水,升温至回流反应。
8.根据权利要求1所述氟啶虫酰胺的合成方法,其特征在于:4-三氟甲基烟酸、氨基乙腈盐酸盐、缩合剂、缚酸剂与相转移催化剂摩尔比为1:1-1.3:1-1.3:3-3.5:0.1-0.2。
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CN113943249A (zh) * | 2021-11-18 | 2022-01-18 | 江苏中旗科技股份有限公司 | 一种n-氰甲基-4-(三氟甲基)烟酰胺的制备方法 |
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CN113943249A (zh) * | 2021-11-18 | 2022-01-18 | 江苏中旗科技股份有限公司 | 一种n-氰甲基-4-(三氟甲基)烟酰胺的制备方法 |
CN113943249B (zh) * | 2021-11-18 | 2023-08-29 | 江苏中旗科技股份有限公司 | 一种n-氰甲基-4-(三氟甲基)烟酰胺的制备方法 |
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