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 ethyl 1-benzyl-3-oxopiperidine-4-carboxylate hydrochloride
175406-94-7

ethyl 1-benzyl-3-oxopiperidine-4-carboxylate hydrochloride synthesis

2synthesis methods
-

Yield: 99%

Reaction Conditions:

with sodium hydride for 0.333333 h;Heating / reflux;

Steps:

51.1
[0248] To a stirred mixture of l-benzylpiperidin-3-one (72 g) and dimethyl carbonate (500 mL) was added NaH (38 g, 60%). After 20 minutes at reflux, water (800 mL) was added. The resulting solution was extracted with ethyl acetate (3 x 400 mL), dried over sodium sulfate and concentrated to give methyl l-benzyl-3- oxopiperidine-4-carboxylate as a brown oil (93 g, 99%). LCMS: 248 (M+H) +.

References:

KALYPSYS, INC. WO2009/26241, 2009, A1 Location in patent:Page/Page column 77-78

ethyl 1-benzyl-3-oxopiperidine-4-carboxylate hydrochloride Related Search: