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-BIS(4-HYDROXY-3,5-DIMETHYLPHENYL)PROPANE
5613-46-7

2,2-BIS(4-HYDROXY-3,5-DIMETHYLPHENYL)PROPANE synthesis

1synthesis methods
-

Yield:5613-46-7 94%

Reaction Conditions:

with sulfuric acid in Petroleum ether at 27; for 3.75 h;

Steps:

4.2.4 Typical experimental procedure for bis-phenols (7, 20a-e)12,18
General procedure: To a stirred mixture of 2,6-dimethyl phenol 8 (5.0g, 41.0mmol) and aldehyde/ketone (94.0mmol) in light petroleum (40ml) hydrochloric acid (5ml, 36% w/v) was added in the case of aldehydes or H2SO4 (1.5ml, 98%) in the case of ketones over a period of 15minat room temperature (27°C) and was further stirred for an appropriate time (Table 1). The reaction mixture was then diluted 10 times of its volume with water and was further stirred for 15min. The solid thus obtained was filtered on a Buchner funnel, washed thoroughly with water and dried at 85-90°C under vacuum to give the crude product, which was purified by flash chromatography. Elution of the column with EtOAc/hexane afforded bisphenol as a white crystalline solid. The structures of the products 7, 20(a-e) were confirmed by completely matched mp, IR, 1H and 13C NMR and mass data reported in literature.12,18

References:

Singh, Deepak;Chaudhari, Umesh V.;Deota, Pradeep T. [Tetrahedron,2014,vol. 70,# 30,p. 4485 - 4493]

FullText

淳化县| 鄂托克旗| 刚察县| 应城市| 牡丹江市| 加查县| 米林县| 房产| 景宁| 扎囊县| 沈丘县| 德江县| 馆陶县| 鄂尔多斯市| 简阳市| 临沭县| 平定县| 苍溪县| 思南县| 襄汾县| 彭山县| 深泽县| 黄冈市| 乡宁县| 忻城县| 襄城县| 华宁县| 达日县| 壤塘县| 乌什县| 互助| 迁安市| 如皋市| 虞城县| 房产| 榆社县| 勃利县| 延寿县| 长子县| 金寨县| 台安县|