成人免费xx,国产又黄又湿又刺激不卡网站,成人性视频app菠萝网站,色天天天天

Welcome to chemicalbook!
Chinese English Japanese Germany Korea
400-158-6606
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 Succinic anhydride
108-30-5

Succinic anhydride synthesis

13synthesis methods
A solution of succinic acid (500 mg, 42 mmol) and triethylamine (1.23 mL, 42 mmol) in anhydrous THF (120 mL) was allowed to react with triphosgene (42 mg, 7.0 mmol) at ice-water temperature for 10 min. The reaction mixture was subsequently stirred for a further 15 min at room temperature. The solution was then filtered, and the filtrate was concentrated to dryness. The residue was crystallized from ethyl acetate to afford the desired product as white crystals (370 mg, 85%).
-

Yield:108-30-5 100%

Reaction Conditions:

with molybdenum (IV) sulfide in 1,4-dioxane at 105; under 4500.45 Torr; for 4 h;Temperature;Pressure;

Steps:

1-10; 1 Example 1

1,4-Dioxane (20mL) was used as the solvent, maleic anhydride (0.211g) was used as the reaction substrate, and two-dimensional MoS2 (0.4284g) was added as the catalyst. The reaction pressure was 0.6MPa and the reaction temperature was 105°C. Under the above conditions, react for 4h to synthesize succinic anhydride. After testing, the conversion rate of maleic anhydride is 19%, and the selectivity of succinic anhydride is 100%.

References:

CN112961130,2021,A Location in patent:Paragraph 0033-0036; 0043-0060

Succinic anhydride Related Search: