午夜插插,噜噜噜影院,啪啪伊人网,欧美熟夫,景甜吻戏视频,男人强操性感蕾丝美女视频在线网站,日本美女跳舞视频

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 2-Pyridinecarboxylicacid,4-hydroxy-3,5-dimethyl-(9CI)
447461-21-4

2-Pyridinecarboxylicacid,4-hydroxy-3,5-dimethyl-(9CI) synthesis

1synthesis methods
-

Yield:447461-21-4 89%

Steps:

9 Synthesis of 2-carboxy-4-hydroxy-3,5-lutidine

EXAMPLE 9 Synthesis of 2-carboxy-4-hydroxy-3,5-lutidine Starting with 2-carboxy-4-chloro-3,5-lutidine, a sodium methoxide nucleophilic substitution reaction was conducted as described above for 24 hours. The aqueous layer was acidified to pH 2.5 with concentrated Hydrochloric acid. The precipitate was filtered and washed with water and dried under vacuum at 50? C. The 2-carboxy-4-hydroxy-3,5-lutidine product was obtained as a light brown solid in 89% yield.

References:

US6437139,2002,B1