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 L-alaninate hydrochloride
1115-59-9

Ethyl L-alaninate hydrochloride synthesis

3synthesis methods
-

Yield:1115-59-9 98%

Reaction Conditions:

in ethanol

Steps:

1.a a)
a) L-Alanine ethyl ester hydrochloride (2) Hydrogen chloride gas was bubbled into a suspension of L-alanine (1) (100 g, 1.12 mol) in dry ethanol (800 ml) and the solution was refluxed for 2 hours. After concentration in vacuo the compound was recrystallized from ethanol-diethyl ether giving the title ester (2) (168.2g, 98%) as a white solid. δH (200 MHz; D2 O) 1.11 (3H, t, J=7.1, CH2 CH3), 1.37 (3H, d, J=7.4, CHCH3), 4.03 (1H, q, J=7.2, CHCH3), 4.09 (2H, q, J=7.2, CH2 CH3), 4.16 (2H, s, NH2); δC (125 MHz; D2 O) 13.98 (CH3), 15.90 (CH3), 49.65 (CH), 64.29 (CH2), 171.57 (CO).

References:

Oxford Asymmetry International plc US5801249, 1998, A

FullText

Ethyl L-alaninate hydrochloride Related Search: