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两性合成
需求描述:Synthesis of 11-Mercaptoundecylphosphorylcholine. The reaction route for the synthesis of 11-mercaptoundecylphosphorylcholine (PC thiol) is presented in Scheme 1. A methanol solution (30 mL) containing 11-mercapto-1-undecanol (2.05 g) (1) was titrated by 1 M iodine methanol solution until the solution turned light yellow, and then the reaction was quenched with sodium bisulfite. 11-Hydroxyundecyl disulfide (2) was precipitated from the methanol solution at 0 C and recrystallized from ethanol with a yield of 1.85 g (90%). 2 (0.407 g, 1 mmol) and triethylamine (0.35 mL, 2.5 mmol) were dissolved in 15 mL of chloroform (CHCl3). This solution was slowly added into 2-chloro-1,3,2,-dioxaphospholane-2-oxide (0.21 mL, ∼2.4 mmol) anhydrous THF (40 mL) solution at -18 C. The mixture was allowed to warm to ambient temperature over 2 h. The reaction mixture was then cooled to 0 C and filtered. The filtrate was concentrated in vacuo at room temperature without further purification, and the product (3) is a colorless to light-yellow oil. 3 and trimethylamine (0.5 mL, 5.5 mol) in anhydrous methane chloride (35 mL) at -15 C were sealed in a bomb, which was heated to 55 C and stirred for 24 h. The reaction mixture was cooled and filtered to give a white solid powder (4, 0.4 g). The white solid powder (0.4 g) was dissolved in ethanol (3 mL), and 1,4-dithio-D,L-threitol (DTT, 0.4 g) was added. The pH of the solution was adjusted to 9 with concentrated NH3‚H2O. The solution was stirred for h
生产数量:最终产物完成足够实验,具体有实验方案
2023-05-06   |  3979人次浏览了解详情
需要氨化代工厂
需求描述:要求不锈钢反应釜设计压力可以到30公斤,需要控制温度在150℃以上,另外需要离心机和普通反应釜做后处理。
生产数量:2吨
2023-03-27   |  10848人次浏览了解详情
发酵重组大肠杆菌
需求描述:重组大肠杆菌发酵,发酵完成后菌体和底物做酶促反应。酶促反应常压控温(温度五六十度)24小时。反应液离心,过膜即可。
生产数量:100吨
2023-02-21   |  9824人次浏览了解详情
需求代工厂
需求描述:需要测温
生产数量:200-300kg
2023-02-16   |  4743人次浏览了解详情
关于工厂整条生产线的采购和安装(功能涂料专用钛白粉生产)
需求描述:关于工厂整条生产线的采购和安装。 第一期订单: 1 氟硅酸铵的升华器(干燥机) sublimator 2 热解设备Pyrohydrolyzing equipment 详细设计图纸已有,请问贵司是否有相关产品设备的生产能力
生产数量:1
2023-02-15   |  2416人次浏览了解详情
氟橡胶边角料
需求描述:不能碳化、不能结团、比表面积大
生产数量:1000吨
2022-07-20   |  6689人次浏览了解详情
优质医药化工中间体项目
需求描述:有配套的设备及流动资金
生产数量:100吨
2022-06-20   |  8595人次浏览了解详情
过氧化物加工
需求描述:20万大卡冷冻机,有烘干,离心机2台
生产数量:100吨
2022-05-08   |  7438人次浏览了解详情
山东省烟台市,五区之外
需求描述:有危化品生产资质或者仓储资质,进出口资质的2000平方左右厂房。
生产数量:8000吨
2022-04-21   |  5011人次浏览了解详情
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