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 5-(ETHOXYMETHYL)-2-FURALDEHYDE
1917-65-3

5-(ETHOXYMETHYL)-2-FURALDEHYDE synthesis

12synthesis methods
-

Yield: 74% , 6%

Reaction Conditions:

with calcium carbonate for 1 h;Reflux;

Steps:

5 Method b
4.5
5-Ethoxymethylfurfural (4)
Compound 2 (500 mg, 2.65 mmol) and CaCO3 (265 mg, 2.65 mmol) were stirred in ethanol (10 mL) until dissolution of 2.
Then reaction mixture was placed on the oil bath and refluxed for 1 h.
After this reaction mixture was cooled down, evaporated to the small volume and partitioned between Et2O (30 mL) and water (30 mL).
Water fraction was additionally extracted with Et2O (3 * 30 mL).
Organic fractions were combined and dried with Na2SO4, then volatiles were removed to give crude 4 (387 mg, 95%) as yellowish oil.
Analysis showed that crude product contained also 9% of 6.

References:

Bredihhin, Aleksei;M?eorg, Uno;Vares, Lauri [Carbohydrate Research,2013,vol. 375,p. 63 - 67]