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 N-Phenylhydroxylamine
100-65-2

N-Phenylhydroxylamine synthesis

11synthesis methods
To a dispersion of 180 gm (2.75 gm-atom) of zinc dust in 500 ml of 50% aqueous ethanol, with vigorous stirring, is added 130 ml (156 gm, 1.27 mole) of nitrobenzene. The reaction is initiated by the dropwise addition of an aqueous ammonium chloride solution and can thereafter be maintained at a controllable rate by the cautious addition of the remaining ammonium chloride solution. The reaction temperature rises during this reduction step. Once reflux has subsided, the basic zinc salts are filtered off using a sintered glass funnel. The light green filtrate is cooled in an ice-salt mixture to precipitate the product. The yield is 100 gm (72.2%), m.p. 81°C.
The reduction of 2-methyl-2-nitropropane is carried out in a similar manner at 10-20°C to afford a 68% yield of N-t-butylhydroxylamine (m.p. 60-62°C). 
-

Yield:100-65-2 98%

Reaction Conditions:

with hydrogen;silica-supported platinum;dimethyl sulfoxide;N-butylamine in isopropyl alcohol at 20; under 760.051 Torr; for 1.75 h;Product distribution / selectivity;

Steps:

51
Into a flask, 20 mg of the silica gel platinum catalyst (5% by weight of Pt) [product name: 5% Pt-silica powder "Escat 2351", manufactured by STREM Co., Ltd.] (0.0026 time mole of platinum, relative to nitrobenzene), 2 mL of IPA (isopropyl alcohol), 0.42 mmol of dimethylsulfoxide (30 μL), 0.072 mmol of n-butylamine (7.1 μL) (14 equivalents, relative to platinum weight in the silica gel platinum catalyst) and 2 mmol of various nitroaryl compounds described in the following Table 5 were charged, and then a balloon sealed with hydrogen gas (about 2 L) was attached, and a reaction was carried out under stirring at room temperature for predetermined time under ordinary pressure. After completion of the reaction, 20 μL of the resultant reaction solution was diluted with 10 mL of 2-propanol containing 0.1 M of toluene, and after removal of the catalyst by using a membrane filter, IPA was removed under reduced pressure, and it was analyzed with NMR. The results are summarized in Table 5.

References:

Wako Pure Chemical Industries, Ltd.;National Institute of Advanced Industrial Science and Technology EP2154125, 2010, A1 Location in patent:Page/Page column 23-24

FullText

N-Phenylhydroxylamine Related Search:

海丰县| 禄丰县| 云梦县| 绥滨县| 临桂县| 江华| 梨树县| 稷山县| 田林县| 廉江市| 平潭县| 长子县| 岑溪市| 开原市| 贡嘎县| 安庆市| 伽师县| 铁力市| 万源市| 文安县| 于都县| 汝南县| 兴仁县| 威宁| 泰来县| 杭州市| 和田县| 姚安县| 安龙县| 平凉市| 达州市| 霞浦县| 哈尔滨市| 衡山县| 郎溪县| 沭阳县| 睢宁县| 廊坊市| 襄城县| 晋宁县| 紫云|