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 4,4'-Dichlorobenzil
3457-46-3

4,4'-Dichlorobenzil synthesis

12synthesis methods
-

Yield:3457-46-3 85%

Reaction Conditions:

with 1,1,1,3',3',3'-hexafluoro-propanol;dimethyl sulfoxide at 130; for 20 h;

Steps:

4. General Experimental Procedure for the Synthesis of 1,2-Diketones 2a-r using Diarylacetylenes 1a-r.

General procedure: A 10 mL reaction vial was charged with internal alkynes 1a-r (1.0 mmol), HFIP (10.0 mmol) and DMSO (2 mL). The reaction vial was then sealed and heated at 130 °C for 20 h. After completion of the reaction (progress was monitored by TLC; SiO2, Hexane/EtOAc = 9:1), the mixture was diluted with ethyl acetate (15 mL) and water (20 mL) and extracted with ethyl acetate (3 × 10 mL). The combined organic layer was washed with brine (3 × 10 mL) and dried over anhydrous Na2SO4. Solvent was removed under reduced pressure and the remaining residue was purified by column chromatography over silica gel using hexane / ethyl acetate = 9:1 as an eluent to obtain the desired 1,2-diketones 2a-r in high isolated yields.

References:

Gujjarappa, Raghuram;Vodnala, Nagaraju;Putta;Ganga Reddy, Velma;Malakar, Chandi C. [Tetrahedron Letters,2020,vol. 61,# 10,art. no. 151588] Location in patent:supporting information

4,4'-Dichlorobenzil Related Search:

临沂市| 镇坪县| 三原县| 淄博市| 康保县| 大方县| 房山区| 铜陵市| 南雄市| 海口市| 勐海县| 叙永县| 广南县| 綦江县| 大竹县| 甘泉县| 麻江县| 罗江县| 天等县| 上高县| 蚌埠市| 宣化县| 永登县| 大悟县| 苍南县| 邢台县| 惠来县| 太和县| 苏尼特右旗| 东山县| 铁岭市| 阿瓦提县| 洛隆县| 邵东县| 法库县| 大厂| 商水县| 天镇县| 从江县| 通河县| 汉源县|