午夜插插,噜噜噜影院,啪啪伊人网,欧美熟夫,景甜吻戏视频,男人强操性感蕾丝美女视频在线网站,日本美女跳舞视频

Welcome to chemicalbook!
Chinese English Japanese Germany Korea
010-86108875
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 L-Pyroglutamamide
16395-57-6

L-Pyroglutamamide synthesis

3synthesis methods
Methyl L-pyroglutamate

4931-66-2

L-Pyroglutamamide

16395-57-6

GENERAL METHOD: L-Pyroglutamic acid methyl ester (10 mmol) was dissolved in a mixed NH3[aq]/N2H4[aq] solution (50 mL) at room temperature and the reaction was stirred for 12 hours. Subsequently, the reaction mixture was allowed to stand at -10 °C for 24 h to promote crystallization. The resulting crystals were washed sequentially with ethanol and ether and dried with anhydrous MgSO4. The crude product was purified by fast column chromatography on silica gel with the eluent methanol/dichloromethane (1:6, v/v), resulting in the pure (S)-5-oxopyrrolidine-2-carboxamide in white solid form.

L-Pyroglutamamide Related Search: