取代脲

取代脲的合成及其体外抗菌作用

The preparation of substituted ureas and their in vitro bacteriostatic activity

具有光学活性的胺或氨基酸酯与脲在乙酸水溶液中反应，合成了具有光学活性的取代脲，产率81%～86%

Amines or amido esters with optical activity reacted with ureas in acetic acid gave the N substituted ureas with optical activity in 81 % to 86 % yield .

用二（三氯甲基）碳酸酯（BTC）代替光气，“一锅法”合成了8种取代脲类除草剂，产物结构经元素分析、IR确证。

Eight substituted ureas herbicides were synthesized with bis ( trichloromethyl ) carbonate ( BTC ) . The production structures were identified by elemental analysis and IR .

二（三氯甲基）碳酸酯一锅法合成取代脲类除草剂

One-pot Preparation of Substituted Ureas Herbicides with Bis ( trichloromethyl ) Carbonate

不对称芳香取代脲的合成

Study on synthesis of unsymmetrical aromatic disubstituted ureas

具光学活性的取代脲的合成

The synthesis of N-substituted ureas with optical activity

非对称取代脲的合成与应用

Synthesis and Application of Unsymmetrically Substituted Ureas

硅胶担载离子液体催化剂的制备及其在由胺制二取代脲反应中的应用

Preparation of SiO_2-Gel Supported Ionic Liquid Catalyst and Its Application in Synthesis of N , N ′ - Disubstituted Ureas from Amines

设计并合成了23个芳酰基硫脲类化合物，95个双取代脲类化合物及25个双取代硫脲类化合物。

Total 23 compounds of Aroyl thiourea scaffold . 95 compounds of bis-substituted urea scaffold , 25 compounds of thiourea scaffold were designed and prepared .

采用双氰胺取代脲体系，研制出一种可中温固化，适合缠绕后接触压固化成形的低粘度环氧树脂体系。

A dicyandiamide low viscosity epoxy resin system accelerated by substituted urea was investigated . It is adapted for tape winding and can be fairly cured at 125 ℃ with contact pressure .

一锅法合成手性双取代不对称脲

One-pot Synthesis of Chiral N , N ' - Unsymmetrically Disubstituted Urea

1,4&二取代氨基脲的合成及抗菌活性

Synthesis and Antibacterial Activity of 1,4-Disubstituted Semicarbazides

丙酰基二茂铁和4-取代氨基脲反应制得8个相应的缩氨基脲1～8，它们均属首次制得。

Propionyl ferrocene reacted with 4-substituted semicarbazides converted into corresponding semicarbazones 1-8 , which are not prepared previously .

目的：探讨氟脲嘧啶脂质体注射液（139-3）取代5-氟脲嘧啶注射液（5-FU）的联合化疗方案治疗转移性胃癌的近期疗效、不良反应及对宿主免疫系统的影响。

Objective : The therapeutic efficacy and adverse effects of combined chemotherapy consisting of fluorouracil lipid injection for metastatic gastric carcinoma were evaluated in our study .

氟脲嘧啶脂质体注射液取代5-氟脲嘧啶注射液联合化疗治疗转移性胃癌近期疗效的评价

Combined Chemotherapy Consisting of Fluorouracil Lipid Injection for Metastatic Gastric Carcinoma

丙烯腈的化学I.丙烯腈和取代乙内醯脲的反应

Chemistry of acrylonitrile i.reaction of acrylonitrile and substituted hydantoin

本文用DSC、TBA、旋转粘度计等手段对一系列不同结构及不同取代基取代的脲衍生物对环氧树脂/双氰双胺固化体系的潜伏性促进作用作了考察。

A series of different substituted ureas were evaluated as latent accelerators in the curing of dicyandiamide-cured epoxy resin by DSC , TBA and rotation viscometer techniques .

报道了在丙酮溶液中用Fe2（SO4）3·XH2O做氧化剂，由取代二芳氨基脲高效合成双偶氮类化合物的新方法。此法反应简单有效，易于操作，后处理简便。

A new and convenient synthesis method for preparing bisazo compounds has been reported . Eight kinds of aryl substituted carbazides are oxidized into the corresponding bis-azo compounds with inexpensive oxidizing agent Fe_2 ( SO_4 ) _3 · XH_2O under mild condition good yields .

超声波作用下5,5-二取代乙内酰脲的合成

Synthesis of 5,5-Disubstituted Hydantoins Under Ultrasound

结果与结论合成了13个多取代香豆素磺酰脲类化合物（BMSU1～BMSU13），所有目标化合物均未见文献报道，其结构经红外光谱、核磁共振氢谱和质谱确证。

Results and conclusion A series of coumarin 6 sulfonylureas ( BMSU 1 ~ BMSU 13 ) were synthesized and their structures were identified by IR , 1H NMR and MS spectra never reported .

用N－取代三氯乙酰胺合成不对称取代脲

Study on Synthesis of Unsymmetrical Disubstituted Ureas from N-Substituted Trichloroacetamide

硒催化取代硝基苯的羰基化合成不对称取代脲类除草剂

Selenium-catalyzed carbonylation of substituted nitrobenzenes to unsymmetric urea herbicides