CN108947873A - 2-(3,3,3-三氟丙基)苯磺酰胺的制备方法 - Google Patents
2-(3,3,3-三氟丙基)苯磺酰胺的制备方法 Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 45
- 238000006722 reduction reaction Methods 0.000 claims abstract description 23
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 14
- 230000035484 reaction time Effects 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000003054 catalyst Substances 0.000 abstract description 2
- 239000010970 precious metal Substances 0.000 abstract description 2
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 241000196324 Embryophyta Species 0.000 description 5
- 239000005604 Prosulfuron Substances 0.000 description 4
- LTUNNEGNEKBSEH-UHFFFAOYSA-N Prosulfuron Chemical compound COC1=NC(C)=NC(NC(=O)NS(=O)(=O)C=2C(=CC=CC=2)CCC(F)(F)F)=N1 LTUNNEGNEKBSEH-UHFFFAOYSA-N 0.000 description 4
- UKVIEHSSVKSQBA-UHFFFAOYSA-N methane;palladium Chemical compound C.[Pd] UKVIEHSSVKSQBA-UHFFFAOYSA-N 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 238000009903 catalytic hydrogenation reaction Methods 0.000 description 3
- 230000002363 herbicidal effect Effects 0.000 description 3
- 239000004009 herbicide Substances 0.000 description 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 240000008042 Zea mays Species 0.000 description 2
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 2
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 2
- 235000005822 corn Nutrition 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- -1 3,3,3- trifluoro propyl Chemical group 0.000 description 1
- 241000219144 Abutilon Species 0.000 description 1
- 241000219318 Amaranthus Species 0.000 description 1
- 235000007319 Avena orientalis Nutrition 0.000 description 1
- 241000209763 Avena sativa Species 0.000 description 1
- 235000007558 Avena sp Nutrition 0.000 description 1
- 241000219312 Chenopodium Species 0.000 description 1
- 244000068988 Glycine max Species 0.000 description 1
- 235000010469 Glycine max Nutrition 0.000 description 1
- 244000020551 Helianthus annuus Species 0.000 description 1
- 235000003222 Helianthus annuus Nutrition 0.000 description 1
- 240000005979 Hordeum vulgare Species 0.000 description 1
- 235000007340 Hordeum vulgare Nutrition 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 231100000674 Phytotoxicity Toxicity 0.000 description 1
- 244000292697 Polygonum aviculare Species 0.000 description 1
- 235000006386 Polygonum aviculare Nutrition 0.000 description 1
- 244000061456 Solanum tuberosum Species 0.000 description 1
- 235000002595 Solanum tuberosum Nutrition 0.000 description 1
- 240000006394 Sorghum bicolor Species 0.000 description 1
- 235000011684 Sorghum saccharatum Nutrition 0.000 description 1
- 240000006694 Stellaria media Species 0.000 description 1
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical group O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 1
- 244000269722 Thea sinensis Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 244000098338 Triticum aestivum Species 0.000 description 1
- 238000004176 ammonification Methods 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
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- 229910052799 carbon Inorganic materials 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 235000009508 confectionery Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004128 high performance liquid chromatography Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
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- 238000002156 mixing Methods 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
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- 235000009566 rice Nutrition 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C303/00—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides
- C07C303/36—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides of amides of sulfonic acids
- C07C303/40—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides of amides of sulfonic acids by reactions not involving the formation of sulfonamide groups
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Abstract
本发明公开了一种2‑(3,3,3‑三氟丙基)苯磺酰胺的制备方法,它是由2‑(3,3,3‑三氟‑1‑丙烯基)苯磺酰胺经还原反应得到;还原反应是在镁条和甲醇的存在下进行的。2‑(3,3,3‑三氟‑1‑丙烯基)苯磺酰胺与镁条的摩尔比为1∶1~1∶3;2‑(3,3,3‑三氟‑1‑丙烯基)苯磺酰胺与甲醇的重量比为1∶3~1∶10;还原反应温度为10~60℃;还原反应时间为1~5h。本发明采用镁条+甲醇还原体系还原2‑(3,3,3‑三氟‑1‑丙烯基)苯磺酰胺,相比于贵金属催化氢化操作简单,生产成本较低。本发明通过对反应条件进行优化,能够获得较高的反应收率和产物纯度,适合工业化大生产。
Description
技术领域
本发明属于除草剂中间体制备技术领域,具体涉及一种氟磺隆中间体2-(3,3,3-三氟丙基)苯磺酰胺的制备方法。
背景技术
氟磺隆(也称三氟丙磺隆)的化学名称为1-(4-甲氧基-6-甲基-1,3,5-三嗪-2-基)-3-[2-(3,3,3-三氟丙基)苯磺酰]脲,主要用于防除阔叶杂草,对苘麻属、苋属、藜属、蓼属、繁缕属等杂草具有优异的防效。适宜作物如玉米、高粱、禾谷类作物、草坪和牧场。因其在土壤中的半衰期为8~40d,在玉米植株内的半衰期为1~2.5h,明显短于其它商品化磺酰脲类除草剂在玉米植株内的代谢时间。对玉米等作物安全,对后茬作物如大麦、小麦、燕麦、水稻、大豆、马铃薯影响不大,但对甜莱、向日葵有时会产生药害。主要用于苗后除草,使用剂量为10~40g(a.i.)/ha。若与具它除草剂混合应用,还可进一步扩大除草谱。
2-(3,3,3-三氟丙基)苯磺酰胺则是合成氟磺隆的重要中间体,对于该中间体的制备,现有技术公开了以下两种方法:
方法一:中国专利文献CN101597246A公开的以1,2-二氯-4-(3,3,3-三氟丙烷基)苯为起始原料,经磺化、氨化得到4,5-二氯-2-(3,3,3-三氟丙基)苯磺酰胺,然后经钯碳催化氢化得到2-(3,3,3-三氟丙基)苯磺酰胺。
方法二:美国专利文献US4671819公开的以2-(3,3,3-三氟-1-丙烯基)苯磺酰胺为起始原料,直接经钯碳催化氢化得到2-(3,3,3-三氟丙基)苯磺酰胺。
方法一合成路线较长,总收率较低,而且钯碳催化氢化操作复杂,生产成本较高。
方法二合成路线较短,收率较高,但是仍然存在钯碳催化氢化操作复杂、生产成本较高的缺陷。
发明内容
本发明的目的在于解决上述问题,提供一种操作简单、生产成本较低的2-(3,3,3-三氟丙基)苯磺酰胺的制备方法。
实现本发明目的的技术方案是:一种2-(3,3,3-三氟丙基)苯磺酰胺的制备方法,它是由2-(3,3,3-三氟-1-丙烯基)苯磺酰胺经还原反应得到;其特征在于:所述还原反应是在镁条和甲醇的存在下进行的。
所述2-(3,3,3-三氟-1-丙烯基)苯磺酰胺与所述镁条的摩尔比为1∶1~1∶3,优选为1∶2。
所述2-(3,3,3-三氟-1-丙烯基)苯磺酰胺与所述甲醇的重量比为1∶3~1∶10,优选为1∶5。
所述还原反应温度为10~60℃,优选为30~40℃。
所述还原反应时间为1~5h,优选为2h。
为了获得较高的反应收率和产物纯度,所述2-(3,3,3-三氟-1-丙烯基)苯磺酰胺与所述镁条的摩尔比为1∶2~1∶3;所述2-(3,3,3-三氟-1-丙烯基)苯磺酰胺与所述甲醇的重量比为1∶5;所述还原反应温度为30~40℃;所述还原反应时间为2~5h。
为了获得最高的反应收率和产物纯度,所述2-(3,3,3-三氟-1-丙烯基)苯磺酰胺与所述镁条的摩尔比为1∶2;所述2-(3,3,3-三氟-1-丙烯基)苯磺酰胺与所述甲醇的重量比为1∶5;所述还原反应温度为30~40℃;所述还原反应时间为2h。
本发明具有的积极效果:
(1)本发明采用镁条+甲醇还原体系还原2-(3,3,3-三氟-1-丙烯基)苯磺酰胺制备2-(3,3,3-三氟丙基)苯磺酰胺,相比于贵金属催化氢化操作简单,生产成本较低。
(2)本发明通过对反应条件进行优化,能够获得较高的反应收率(95%以上)和产物纯度(95%),适合工业化大生产。
具体实施方式
(实施例1)
本实施例的2-(3,3,3-三氟丙基)苯磺酰胺的制备方法具体如下:
在1L的四口反应瓶中加入400g的甲醇和80g的2-(3,3,3-三氟-1-丙烯基)苯磺酰胺(0.32mol),升温至30~40℃,控制该温度下,分批加入镁条,每30min加一次,每次加1.5g,一共加10次(共15g,0.625mol),加完最后一次,30~40℃保温反应2h。
反应结束后,减压蒸馏甲醇,至有大量固体析出,温度不超过50℃,蒸馏结束,加入300g甲苯,降温至10℃以下,滴加10wt%的稀盐酸,调节pH=4~5,调完搅拌30min,升温至50~60℃,分层,将甲苯层降温至5~10℃,产物析出,抽滤,得到77.0g淡黄色固体,收率为95.5%,纯度为97.7%(HPLC)。
(实施例2~实施例5)
各实施例的制备方法与实施例1基本相同,不同之处见表1。
表1
| 实施例1 | 实施例2 | 实施例3 | 实施例4 | 实施例5 | |
| 镁条 | 15g | 7.7g | 23g | 15g | 15g |
| 甲醇 | 400g | 400g | 400g | 240g | 800g |
| 产量 | 77.0g | 72.6g | 76.6g | 70.2g | 72.6g |
| 收率 | 95.5% | 90.0% | 95.0% | 87.1% | 90.0% |
| 纯度 | 97.7% | 86.3% | 97.2% | 90.5% | 95.6% |
(实施例6~实施例9)
各实施例的制备方法与实施例1基本相同,不同之处见表2。
表2
| 实施例1 | 实施例6 | 实施例7 | 实施例8 | 实施例9 | |
| 温度 | 30~40℃ | 10℃ | 60℃ | 30~40℃ | 30~40℃ |
| 时间 | 2h | 2h | 2h | 1h | 5h |
| 产量 | 77.0g | 60.5g | 63.7g | 68.5g | 76.6g |
| 收率 | 95.5% | 75.0% | 79.0% | 84.9% | 95.0% |
| 纯度 | 97.7% | 80.6% | 93.2% | 89.5% | 96.1% |
Claims (7)
1.一种2-(3,3,3-三氟丙基)苯磺酰胺的制备方法,它是由2-(3,3,3-三氟-1-丙烯基)苯磺酰胺经还原反应得到;其特征在于:所述还原反应是在镁条和甲醇的存在下进行的。
2.根据权利要求1所述的2-(3,3,3-三氟丙基)苯磺酰胺的制备方法,其特征在于:所述2-(3,3,3-三氟-1-丙烯基)苯磺酰胺与所述镁条的摩尔比为1∶1~1∶3。
3.根据权利要求1所述的2-(3,3,3-三氟丙基)苯磺酰胺的制备方法,其特征在于:所述2-(3,3,3-三氟-1-丙烯基)苯磺酰胺与所述甲醇的重量比为1∶3~1∶10。
4.根据权利要求1所述的2-(3,3,3-三氟丙基)苯磺酰胺的制备方法,其特征在于:所述还原反应温度为10~60℃。
5.根据权利要求1所述的2-(3,3,3-三氟丙基)苯磺酰胺的制备方法,其特征在于:所述还原反应时间为1~5h。
6.根据权利要求1至5之一所述的2-(3,3,3-三氟丙基)苯磺酰胺的制备方法,其特征在于:所述2-(3,3,3-三氟-1-丙烯基)苯磺酰胺与所述镁条的摩尔比为1∶2~1∶3;所述2-(3,3,3-三氟-1-丙烯基)苯磺酰胺与所述甲醇的重量比为1∶5;所述还原反应温度为30~40℃;所述还原反应时间为2~5h。
7.根据权利要求1至5之一所述的2-(3,3,3-三氟丙基)苯磺酰胺的制备方法,其特征在于:所述2-(3,3,3-三氟-1-丙烯基)苯磺酰胺与所述镁条的摩尔比为1∶2;所述2-(3,3,3-三氟-1-丙烯基)苯磺酰胺与所述甲醇的重量比为1∶5;所述还原反应温度为30~40℃;所述还原反应时间为2h。
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4671819A (en) * | 1983-03-28 | 1987-06-09 | Ciba-Geigy Corporation | N-phenylsulfonyl-N'-triazinylureas |
| CN104788347A (zh) * | 2015-03-23 | 2015-07-22 | 大连奇凯医药科技有限公司 | 2-(三氟甲氧基)苯磺酰胺的制备方法 |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4671819A (en) * | 1983-03-28 | 1987-06-09 | Ciba-Geigy Corporation | N-phenylsulfonyl-N'-triazinylureas |
| CN104788347A (zh) * | 2015-03-23 | 2015-07-22 | 大连奇凯医药科技有限公司 | 2-(三氟甲氧基)苯磺酰胺的制备方法 |
Non-Patent Citations (3)
| Title |
|---|
| G. H. LEE ET AL.: "Magnesium in Methanol (Mg/MeOH) in Organic Syntheses", 《CURRENT ORGANIC CHEMISTRY》 * |
| ROBERT O. HUTCHINS ET AL.: "Selective Reductions of Conjugated Acetylenes with Magnesium in Methanol and Methanol-D", 《TETRAHEDRON LETTERS》 * |
| 尹志刚: "《有机化学》", 28 February 2010, 河南科学技术出版社 * |
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