Phosphorus oxychloride → 2,5-Dichloropyridin-3-Ol

反応式

[Cl:1][C:2]1[CH:3]=[C:4]([OH:9])[C:5](O)=[N:6][CH:7]=1.P(Cl)(Cl)([Cl:12])=O>>[Cl:12][C:5]1[C:4]([OH:9])=[CH:3][C:2]([Cl:1])=[CH:7][N:6]=1

参加物

反応物 2

HCID 24813Phosphorus oxychloride

HCID 178516188HCID 178516188、化合物

生成物 1

HCID 98989172,5-Dichloropyridin-3-Ol

反応条件

温度: 180 °C

実験手順

A mixture of 5-chloro-2,3-dihydroxypyridine (1.0g.) and phosphoryl chloride (10ml.) was heated overnight at 180°C. in a sealed tube. The phosphoryl chloride was distilled off, and the residue was chromatographed, to give 2,5-dichloro-3-hydroxypyridine, m.p. 160°-161°C. (ethyl acetate - petrol).

後処理

distillationThe phosphoryl chloride was distilled off
customthe residue was chromatographed

出典と根拠

ORDレコード: ord-63b1438ab49a4dbfb9b10952623357a6
出典データセット: uspto-grants-1976_01
DOI: 10.6084/m9.figshare.5104873.v1
特許番号: US03931206

反応ノート

読み込み中…

参加物