天堂网亚洲,天天操天天搞,91视频高清,菠萝蜜视频在线观看入口,美女视频性感美女视频,95丝袜美女视频国产,超高清美女视频图片

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 DI-TERT-BUTYL PHOSPHITE
13086-84-5

DI-TERT-BUTYL PHOSPHITE synthesis

7synthesis methods
-

Yield:13086-84-5 91.5%

Reaction Conditions:

with calcium hydroxide at 130; under 760.051 Torr;Reflux;Inert atmosphere;

Steps:

6 Example 6

In a nitrogen-protected 3L round bottom three-necked flask, 110 g of dimethyl phosphite, 260 g of tert-butanol, and 3.3 g of Ca (OH)2 were added; the temperature was raised to reflux with stirring, and a fraction (methanol) of 60 to 65 ° C. was collected, and then a kettle was set. The bottom temperature is 130 ° C, and the temperature is further increased to reflux under normal pressure, and the two-stage fraction (excessive t-butanol) is distilled off. The crude di-tert-butyl phosphite is obtained at the bottom of the kettle; Further distillation under reduced pressure at a pressure of 1 kPa yielded 181.3 g of di-tert-butyl phosphite with a purity of 98% and a yield of 91.5%.

References:

CN110669069,2020,A Location in patent:Paragraph 0028

DI-TERT-BUTYL PHOSPHITE Related Search: