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 2-Chloro-6-hydroxynicotinic acid
38025-90-0

2-Chloro-6-hydroxynicotinic acid synthesis

2synthesis methods
-

Yield: 88%

Reaction Conditions:

with water;sodium hydroxide at 129; for 4 h;

Steps:

1.a
Step a 2-chloro-6-oxo-1 ,6-dιhydropyrιdιne-3-carboxylιc acιd; ° A 500-mL round-bottom flask was charged with 2,6-dιchloronιcotιnιc acid (25 0 g 130 mmol), NaOH solution (325 ml_, 2N) and the solution was refluxed at 1290C for 4 hours The reaction mixture was cooled to room temperature and acidified with a 6N aq HCI solution The resulting precipitate was filtered and dried under reduced pressure yielding to the desired product (19 87g, 88%)

References:

Location in patent:Page/Page column 97

2-Chloro-6-hydroxynicotinic acid Related Search: