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 Butyric anhydride
106-31-0

Butyric anhydride synthesis

12synthesis methods
To a cooled flask containing 88 gm (1.0 mole) of η-butyric acid at 10°C is added dropwise 28.0 gm (0.5 mole) of methoxyacetylene over a 1-hr period. After stirring the reaction mixture for 16 hr at 20°C the contents are distilled to afford the following three fractions: (1) b.p. 56°C, η& 1.3628, 23 gm (62%), methyl acetate; (2) b.p. 72-73°C (18 mm Hg), n% 1.3990, 10.0 gm (11%), butyric acid; (3) b.p. 91-92°C (18mmHg), 1.4118, 48.0 gm (61%), butyric anhydride.
Preparation of Butyric Anhydride
-

Yield:106-31-0 95%

Reaction Conditions:

with N,N-bis[2-oxo-3-oxazolidinyl]phosphorodiamidic chloride;triethylamine in dichloromethane at 20; for 0.5 h;

References:

Cabre-Castellvi, J.;Palomo-Coll, A.;Palomo-Coll, A.L. [Synthesis,1981,# 8,p. 616 - 620]

FullText

Butyric anhydride Related Search:

宁波市| 花莲市| 锡林郭勒盟| 桂阳县| 工布江达县| 新郑市| 丹江口市| 奉新县| 天峨县| 绥中县| 威海市| 西盟| 昭苏县| 奉节县| 盐津县| 噶尔县| 班戈县| 仁化县| 石阡县| 东平县| 赣州市| 南昌县| 昭觉县| 乳山市| 措美县| 德庆县| 石狮市| 保亭| 尖扎县| 东光县| 应用必备| 太保市| 肇源县| 新邵县| 福海县| 林州市| 怀柔区| 湖北省| 沂南县| 临武县| 湛江市|