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
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 4,5-DICHLORO-6-HYDROXYPYRIMIDINE
88982-91-6

4,5-DICHLORO-6-HYDROXYPYRIMIDINE synthesis

1synthesis methods
-

Yield:-

Reaction Conditions:

in acetic acid

Steps:

R.11.2 4,5,6-trichloropyrimidine (Compound No. 1-11)
(2) The compound obtained in the Reference Example 11(1) (1.92g, 14.7mmol) was dissolved in acetic acid 20ml, followed by heating at 80?C and dropwise addition of antiformin (20ml). After end of the dropwise addition, the mixture was stirred by at 80?C for 30 minutes. The reaction mixture was concentrated and the crystals were collected by filtration. The filtrate was extracted with ethyl acetate. The crystals obtained above were combined with the extract, followed by drying and concentration by evaporation of the solvent. Thus obtained crystals were washed with isopropyl ether and collected by filtration to give 4,5-dichloro-6-hydroxypyrimidine (1.29g). 1H-NMR(DMSO-d6) δ 8.22(1H, s), 13.4(1H, br s) IR(Nujol) 3262, 3070, 1694, 1646, 1625, 1584, 1389, 1054, 1045 cm-1 m.p.:not higher than 202?C

References:

Sumitomo Chemical Takeda Agro Company, Limited EP1333029, 2003, A1

4,5-DICHLORO-6-HYDROXYPYRIMIDINE Related Search: