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 ETHYL 2-[BIS(2,2,2-TRIFLUOROETHYL)PHOSPHONO] PROPIONATE
107905-52-2

ETHYL 2-[BIS(2,2,2-TRIFLUOROETHYL)PHOSPHONO] PROPIONATE synthesis

7synthesis methods
KHMDS (7.50 mL, 3.75 mmol, 0.5 M in toluene) was added to a solution of 18- crown-6 (4.10 g, 15.51 mmol), THF (20 mL), and bis (2,2,2-trifluoroethyl) phosphite (1) (0.50 mL, 3.41 mmol) by syringe in a dropwise manner at -78 ℃. Following 15 min, ethyl 2-bromopropionate (0.40 mL, 3.08 mmol) was added to the round bottom flask and the reaction mixture was allowed to stir for 4 hr at room temperature. Following the standard workup procedure, the crude product was then purified by flash column chromatography (3:1 to 2:1 hexanes:EtOAc, Rf = 0.33 in 1:1 hexanes:EtOAc) yielding Ethyl 2-[Bis(2,2,2-trifluoroethyl)phosphono] Propionate (112 mg, 0.33 mmol, 10.5%) as a yellow syrup.
-

Yield:-

Steps:

Multi-step reaction with 2 steps
1: 77 percent / PCl5 / 2 h / 80 °C
2: 92 percent / triethylamine / benzene / 0 - 22 °C

References:

Hensel, M. J.;Fuchs, P. L. [Synthetic Communications,1986,vol. 16,p. 1285 - 1296]

ETHYL 2-[BIS(2,2,2-TRIFLUOROETHYL)PHOSPHONO] PROPIONATE Related Search:

浑源县| 桂平市| 广西| 烟台市| 广汉市| 朝阳市| 贵南县| 廉江市| 贞丰县| 石棉县| 鹤峰县| 阿巴嘎旗| 白沙| 汉中市| 镇平县| 醴陵市| 越西县| 平远县| 公安县| 阿勒泰市| 新密市| 鄱阳县| 平定县| 万州区| 通许县| 云南省| 长汀县| 公安县| 海城市| 荥经县| 大足县| 永吉县| 中方县| 余庆县| 资溪县| 马鞍山市| 当涂县| 蛟河市| 库车县| 昆山市| 新营市|