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Применить Всего найдено 4. Отображено 4.
28-07-2023 дата публикации

Synthesis and application of N, N-dimethyl carbamate compound of isopropyl substituted cresol

Номер: CN116496182A
Автор: WANG JING, CHEN YUXIANG, LU YANJU, XU SHICHAO, GU YAN, BI LIANGWU, ZHAO ZHENDONG
Принадлежит:

The invention discloses a synthesis method and activity application of an N, N-dimethyl carbamate compound of isopropyl substituted cresol, and particularly relates to synthesis of 3-isopropyl-5-methylphenyl-N, N-dimethyl carbamate and herbicidal activity and insecticidal activity of 3-isopropyl-5-methylphenyl-N, N-dimethyl carbamate. The preparation method comprises the following steps: stirring 3-isopropyl-5-cresol and dimethyl carbamoyl chloride according to a feeding ratio of 1: 10 (g: mL) at 150 DEG C to react for 8 hours, cooling the reaction liquid, filtering to obtain a solid, and drying to obtain 3-isopropyl-5-methylphenyl-N, N-dimethyl carbamate with the purity of more than 97%, and the yield is close to 90%. The inhibitory activity of the 3-isopropyl-5-methylphenyl-N, N-dimethyl carbamate on the growth of barnyard grass and the inhibitory activity of the 3-isopropyl-5-methylphenyl-N, N-dimethyl carbamate on acetylcholin esterase are both superior to those of a pesticide vioxamethoxam ...

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Номер записи: 1
23-09-2010 дата публикации

PREPARATION METHOD OF PIMARIC ACID TYPE RESIN ACID

Номер: WO2010105574A1
Автор: ZHAO, Zhendong, CHEN, Yuxiang, BI, Liangwu, GU, Yan, LI, Dongmei, WANG, Jing, LU, Yanju
Принадлежит:

Preparation method of pimaric acid type resin acid includes the following steps: (1) adding refined resin acid, turpentine or rosin and maleic anhydride at a mass ratio of 1 :0.3-1.5 into a reaction bottle, dissolving them in C1-C10 lower fatty acid solvent, the mass ratio of the C1-C10 low fatty acid to refined resin acid is 0.05-30:1, then carrying out addition reaction by heating directly or with assistance of microwave, subsequently cooling, crystallizing, filtering, and washing, and (2) combining the filtrates collected in step (1), stripping of the solvent by vacuum distillation to obtain pimaric acid type resin acid coarse product, dissolving the resulting coarse product in NaOH aqueous solution to prepare aqueous solution of pimaric acid type resin acid salt, adjusting pH to 6-14 with a mineral acid or an organic acid under stirring, and directly purifying or acidifying followed by purifying the resulting precipitation to obtain the final product. The method has the characteristics ...

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Номер записи: 2
12-09-2017 дата публикации

3 - to meng xi - 1 - amine and its preparation method and biological activity application

Номер: CN0106083603B
Автор: 赵振东, 朱守记, 徐士超, 陈玉湘, 李冬梅, 毕良武, 王婧, 古研, 卢言菊
Принадлежит:

... 本发明公开了种3‑对孟烯‑1‑胺及其制备方法与生物活性应用。将N,N'‑二酰基‑1,8‑对孟烷二胺溶入到强酸水溶液中，搅拌，加热回流反应后，静置分层。将上层黄色油状液体转入到另个反应瓶中，并加入适量的乙二醇和强碱，开动搅拌，加热除去部分低沸点物质后，升温后，换上冷凝管，加热回流反应。反应结束后，用乙酸乙酯萃取。向萃取得到的有机层中加入水并将pH调至酸性。取水相并用碱将其pH调至9～11，分层。上层黄色透明液体即为3‑对孟烯‑1‑胺，减压精馏纯化。本发明反应条件较为温和，无毒，易操作，原料易于合成。本发明制备的3‑对孟烯‑1‑胺具有定的抑菌活性和除草活性。 ...

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Номер записи: 3
12-05-2023 дата публикации

Preparation method of levo-4-terpilenol

Номер: CN116102400A
Автор: XU SHICHAO, CHEN YUXIANG, WANG JING, LU YANJU, BI LIANGWU, GU YAN, CHENG XIAN
Принадлежит:

The invention provides a preparation method of levo4-terpilenol, which is characterized in that natural terpenoid essential oil rich in 3-carene is used as a raw material, an organic solvent is used as a reaction medium, water is used as a reaction reagent, macroporous cation exchange resin is used as a catalyst, and the levo4-terpilenol is generated through direct hydration in a homogeneous solution system. The method is mainly characterized in that all other materials except the solid acid used as the catalyst are positioned in a complete uniform liquid phase system. The method has the advantages that the reaction conditions are mild, the solvent and the product are easy to separate, the conversion rate from the raw material 3-carene to the target product is high, the purity of the product levo-4-terpilenol is high, the solid acid catalyst can be repeatedly used, and the like.

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Номер записи: 4