一二三四区视频,亚洲少妇熟女色,日本久热无码视频网,欧美国产日韩大尺度,亚洲a视频,久久少妇一区二区,日韩999无码视频,刺激久久久久久久,啊啊啊啊不要啊在线

Welcome to chemicalbook!
Chinese English Japanese Germany Korea
010-86108875
Try our best to find the right business for you.
Do not miss inquiry messages Please log in to view all inquiry messages.

Welcome back!

ChemicalBook CAS DataBase List 2-[2-[2-[2-[2-[2-(BENZYLOXY)ETHOXY]ETHOXY]ETHOXY]ETHOXY]ETHOXY]ETHANOL
24342-68-5

2-[2-[2-[2-[2-[2-(BENZYLOXY)ETHOXY]ETHOXY]ETHOXY]ETHOXY]ETHOXY]ETHANOL synthesis

5synthesis methods
-

Yield: 20%

Reaction Conditions:

in aqueous sodium hydroxide at 100; for 2 h;

Steps:

10.a (E)-4-(1,3-Bis(cyclohexylmethyl)-1,2,3,6-tetrahydro-2,6-dioxo-9H-purin-8-yl)cinnamic Acid Nonaethylene Glycol Methyl Ether Ester
(a) nonaethylene Glycol Monomethyl Ether A mixture of hexaethylene glycol (Aldrich, 100 g) and benzyl bromide (Aldrich, 12 g) in aqueous sodium hydroxide (50% (w/w), 80 ml) was stirred at 100° C. (oil bath) under nitrogen for 2 h. The reaction mixture was then cooled to ambient temperature, diluted with water to a total volume of 500 ml, and extracted with diethyl ether (200 ml) to remove dibenzylated product. sodium chloride (100 g) was added to the aqueous layer, which was extracted further with diethyl ether (6*100 ml). These ether extracts were combined, dried (sodium sulfate), and concentrated to give hexaethylene glycol monobenzyl ether as an oil (25 g, 20% based on glycol), 1H-NMR (CDCl3) δ: 7.30 (m, 5, 5 phenyl CH), 4.53 (s, 2, benzyl CH2), 3.69-3.54 (m, 22, 11 OCH2), 3.06 (br s, 3, OH and CH2O).

References:

Glaxo Wellcome Inc. US6355646, 2002, B1 Location in patent:Page column 13

2-[2-[2-[2-[2-[2-(BENZYLOXY)ETHOXY]ETHOXY]ETHOXY]ETHOXY]ETHOXY]ETHANOL Related Search:

隆尧县| 临汾市| 阜南县| 北京市| 霍邱县| 宜兴市| 汉源县| 诸城市| 玉树县| 额敏县| 尤溪县| 若尔盖县| 罗源县| 长阳| 南城县| 松潘县| 宣武区| 砀山县| 营口市| 浦北县| 措美县| 怀仁县| 宜丰县| 惠东县| 遂平县| 益阳市| 库车县| 武义县| 秭归县| 阿城市| 云南省| 芮城县| 衡山县| 临江市| 南江县| 泰顺县| 红原县| 界首市| 延长县| 汝阳县| 银川市|