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:

宣汉县| 屏东市| 玉溪市| 陇南市| 吉隆县| 甘德县| 林周县| 余江县| 昌吉市| 邳州市| 荣昌县| 安塞县| 霍山县| 江口县| 麟游县| 互助| 嘉善县| 白玉县| 阜康市| 英超| 绍兴市| 万安县| 莆田市| 郧西县| 平度市| 东明县| 浦江县| 交口县| 叶城县| 永福县| 唐河县| 泗洪县| 大石桥市| 怀柔区| 蒙自县| 瑞昌市| 图们市| 尼勒克县| 平罗县| 仪征市| 郁南县|