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 7-Fluoroisatin
317-20-4

7-Fluoroisatin synthesis

6synthesis methods
-

Yield:317-20-4 98.6%

Reaction Conditions:

with sulfuric acid at 65 - 80; for 0.666667 h;

Steps:

1
In a 250 mL four-necked flask,20 g (0.11 mol) of N- (2-fluorophenyl) -2-isonitrosonanilide were added portionwise to 100 mL of concentrated sulfuric acid,Feeding process temperature does not exceed 65 ,Feeding complete,The temperature was raised to 80 ° C and the reaction was stirred for about 40 minutes.Reaction completed,The reaction solution was quenched with vigorous stirring into 500 mL of crushed ice,After stirring for 1 hour,filter,dry,Recrystallization from ethyl acetate / petroleum ether gave 16.78 g of 7-fluoroisatin as a yellow solid (yield 98.6%).

References:

Changzhou Vocational Institute of Engineering;Liu, Changchun;Cheng, Jin;Liu, Chengxian;Jiang, Ruoyu;Xu, Jin;Xue, Xuming;Zhou, Dongdong CN105732462, 2016, A Location in patent:Paragraph 0018

FullText

7-Fluoroisatin Related Search: