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
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 4-Carboxynaphthalene-1-boronic acid
332398-57-9

4-Carboxynaphthalene-1-boronic acid synthesis

2synthesis methods
-

Yield:332398-57-9 78%

Reaction Conditions:

with sodium hydroxide;potassium permanganate in water;

Steps:

17 Description 17; 4-Carboxy-1-naphthylboronic acid (D17)

To a stirred solution of D16 (0.25g, 1.25mmole) and NaOH (0.15g, 3.75mmole) in water (5ml) at 0°C was added dropwise a solution of KMnO4 (0.19g. 0.120mmole) in water (5ml).. After 0.25h sodium metabisulphite (excess) was added and the mixture acidified with 6M HCl and extracted with EtOAc (3x 15ml).. The extracts were dried and concentrated to dryness to afford the title compound as cream powder (0.21 g, 78%).

References:

EP1216239,2004,B1 Location in patent:Page 10

4-Carboxynaphthalene-1-boronic acid Related Search: