天堂网亚洲,天天操天天搞,91视频高清,菠萝蜜视频在线观看入口,美女视频性感美女视频,95丝袜美女视频国产,超高清美女视频图片

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 N-BOC-(S)-2-AMINO-3-HYDROXY-3-METHYLBUTANOIC ACID
102507-13-1

N-BOC-(S)-2-AMINO-3-HYDROXY-3-METHYLBUTANOIC ACID synthesis

10synthesis methods
182958-73-2 Synthesis
Carbamic acid, [2-hydroxy-1-(hydroxymethyl)-2-methylpropyl]-, 1,1-

182958-73-2
3 suppliers
inquiry

-

Yield:102507-13-1 76%

Reaction Conditions:

with sodium dihydrogenphosphate in tetrahydrofuran at 0; for 4 h;

Steps:

1.2 Step 2: Preparation of (s)-2-tert-butoxyamido-3-methyl-3-hydroxybutyric acid
(s)-2-tert-butoxyamido-3-methyl-3-hydroxybutanol (20 g) was added to THF (50 mL). After adding saturated sodium dihydrogen phosphate solution (50 mL), the reaction was cooled to 0°C. Add bleach (6%, 350 mL) slowly. After 4 hours of reaction, slowly rise to room temperature. After TLC detects that the reaction is complete, it is quenched by adding sodium thiosulfate. Rotary evaporation to remove THF, then add dichloromethane (100mLX4) for extraction, dry and filter, concentrate to the crude reaction product, add n-hexane (100mL), beating and filtering to obtain pure product (s)-2-tert-butoxyamide -3-Methyl-3-hydroxybutyric acid (16 g, 76%).

References:

Zhejiang Kaipu Chemical Co., Ltd.;Luo Linfeng;Tan Xianghui;Yan Xiaodong;Shen Yipeng;Zhou Chen CN111909067, 2020, A Location in patent:Paragraph 0023-0025; 0028-0029

FullText

N-BOC-(S)-2-AMINO-3-HYDROXY-3-METHYLBUTANOIC ACID Related Search: