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 DIETHYL 2-BROMOETHYLPHOSPHONATE
5324-30-1

DIETHYL 2-BROMOETHYLPHOSPHONATE synthesis

7synthesis methods
-

Yield:5324-30-1 95%

Reaction Conditions:

for 2 h;Reflux;

Steps:

1.i
1,2-dibromoethane (69 ml, 0.8 mol) was poured into a two-necked 150 mL round-bottom flask. Triethylphosphite (34.3 ml, 0.2 mol) was added under stirring and the mixture was then refluxed for 2 hours. The excess of 1,2-dibromoethane was removed by rotary evaporation under gentle warming at 60-70° C. The residue was distilled under reduced pressure (2 mmHg, 95-105° C. or 1 mmHg, 75° C.). Yield 95%.1H NMR (CDCl3), δ(ppm)=4.01 (m, 4H); 3.42 (q, 2H); 2.27 (m, 2H); 1.22 (t, 6H).31P{1H} (CDCl3): δ(ppm)=26.4.

References:

NIHON MED-PHYSICS CO., LTD. US2010/160615, 2010, A1 Location in patent:Page/Page column 9

FullText

DIETHYL 2-BROMOETHYLPHOSPHONATE Related Search:

开封市| 呼伦贝尔市| 云林县| 平南县| 阳城县| 黑水县| 老河口市| 凤台县| 万全县| 孝昌县| 称多县| 二连浩特市| 山丹县| 彰化市| 班戈县| 水富县| 福泉市| 师宗县| 洛川县| 苏尼特左旗| 大同市| 札达县| 尼木县| 周宁县| 平南县| 泰顺县| 博野县| 邛崃市| 沈丘县| 城固县| 茌平县| 称多县| 桃源县| 龙江县| 白玉县| 长白| 孟州市| 湟中县| 七台河市| 宜良县| 贡嘎县|