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 diethyl 1,2-cyclopentanedicarboxylate
90474-13-8

diethyl 1,2-cyclopentanedicarboxylate synthesis

4synthesis methods
-

Yield:90474-13-8 82.4 %

Reaction Conditions:

with hydrogen in 1,4-dioxane at 120 - 180; under 7500.75 - 23252.3 Torr;

Steps:

4.4 Step 4: Preparation of compound VI (diethyl 1,2-cyclopentadicarboxylate)

Put 50g of compound V prepared in step 3 obtained by distillation and purification and 100mL of solvent 1,4-dioxane into a hydrogenation reactor, and then add 1g of Raney nickel and 5g of H-ZSM-5 as hydrogenation catalysts, In the presence of hydrogen, react at 120°C and 1MPa, continue to heat up to 180°C after no hydrogen absorption, and react at 3.1MPa for 10h. After separation, 18g of pure compound VI (82.4% molar yield) is obtained

References:

CN115232058,2022,A Location in patent:Paragraph 0147; 0157-0159