一二三四区视频,亚洲少妇熟女色,日本久热无码视频网,欧美国产日韩大尺度,亚洲a视频,久久少妇一区二区,日韩999无码视频,刺激久久久久久久,啊啊啊啊不要啊在线

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!

156693-50-4

(S)-2-Hydroxy-pentanedioic Acid 5-(Phenylmethyl) Ester synthesis

5synthesis methods
Pentanedioic acid, 2-hydroxy-, 1-(1,1-dimethylethyl) 5-(phenylmethyl) ester, (2S)-

817562-86-0
0 suppliers
inquiry

(S)-2-Hydroxy-pentanedioic Acid 5-(Phenylmethyl) Ester

156693-50-4
5 suppliers
inquiry

-

Yield:-

Reaction Conditions:

with trifluoroacetic acid at 0; for 2 h;

Steps:

248.2

Cooled TFA (5 mL) was added to 1-tert-butyl (S)-5-benzyl 2-hydroxypentanedioate (347 mg, 1.18 mmol), and the mixture was stirred at 0°C for 2 hr. The reaction mixture was concentrated under reduced pressure, and the obtained residue was subjected twice to azeotropy with toluene to give crude (S)-5-(benzyloxy)-2-hydroxy-5-oxopentanoic acid as a colorless oil.

References:

TW2016/2105,2016,A Location in patent:Paragraph 1100

柯坪县| 河曲县| 文水县| 大厂| 胶南市| 甘肃省| 河东区| 平遥县| 如东县| 石河子市| 阳原县| 山阴县| 曲阳县| 金川县| 宜宾县| 辽中县| 丽江市| 桐柏县| 临洮县| 高唐县| 榆社县| 建宁县| 历史| 福清市| 乡宁县| 庄河市| 永康市| 会昌县| 安塞县| 南丹县| 和田市| 申扎县| 尼勒克县| 清镇市| 丽江市| 宜兴市| 淮阳县| 邹平县| 合山市| 富裕县| 胶南市|