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 Salicylaldehyde
90-02-8

Salicylaldehyde synthesis

14synthesis methods
Salicylaldehyde is synthesized from phenol, chloroform, and alkali according to the Reimer–Tiemman method, which was developed in 1876. starting material for the manufacture of coumarin.
-

Yield:90-02-8 100%

Reaction Conditions:

with caesium carbonate in toluene at 80; for 15 h;Sealed tube;Reagent/catalyst;Solvent;Temperature;

Steps:

General procedure for deprotection of triflates

General procedure: Toa solution of aryl triflate 1a-k (0.3 mmol) in distilledtoluene (5 mL) was added Cs2CO3(3 eq.). The suspension was heated at 80 °C (oilbath temp) during 15h. The crude mixture was quenched withethyl acetate (~5 mL) and a saturatedaqueous solution of ammonium chloride (~10 mL).The aqueous layer was extracted with ethyl acetate (2x10 mL). Organic layerswere then combined, dried over MgSO4 and concentratedunder reduced pressure to afford the corresponding phenol 2a-k that was purified byflash chromatography over silica gel.

References:

Green, Alice E.;Agouridas, Vangelis;Deniau, Eric [Tetrahedron Letters,2013,vol. 54,# 51,p. 7078 - 7079] Location in patent:supporting information

Salicylaldehyde Related Search:

炎陵县| 赣州市| 浙江省| 招远市| 三原县| 上林县| 榆中县| 鄂尔多斯市| 新源县| 运城市| 乌苏市| 镇巴县| 富源县| 金阳县| 民权县| 左云县| 县级市| 临夏市| 琼海市| 宁南县| 定边县| 三江| 台前县| 洪洞县| 广安市| 威远县| 宜兰县| 子长县| 红安县| 东丰县| 九寨沟县| 体育| 明水县| 东丽区| 许昌县| 湘潭市| 江津市| 黑山县| 山丹县| 南京市| 崇左市|