N,N-Diethylaniline → 2-Chloro-5,6,7,8-tetrahydroquinazoline

反応式

O[C:2]1[N:11]=[CH:10][C:9]2[CH2:8][CH2:7][CH2:6][CH2:5][C:4]=2[N:3]=1.CCN(C1C=CC=CC=1)CC.P(Cl)(Cl)([Cl:25])=O>>[Cl:25][C:2]1[N:11]=[CH:10][C:9]2[CH2:8][CH2:7][CH2:6][CH2:5][C:4]=2[N:3]=1

参加物

反応物 3

HCID 7061N,N-Diethylaniline

HCID 24813Phosphorus oxychloride

HCID 1785175505,6,7,8-Tetrahydro-2(1H)-quinazolinone

生成物 1

HCID 129338762-Chloro-5,6,7,8-tetrahydroquinazoline

実験手順

A solution of 1 g of 2-hydroxy-5,6,7,8-tetrahydroquinazoline and 0.1 g of diethylaniline in 10 mL of phosphorus oxychloride is refluxed for 2 h, and subsequently cooled and concentrated. The residue is taken up in chloroform and washed with excess 3 N NaOH solution. The organic layer is dried and concentrated to provide 2-chloro-5,6,7,8-tetrahydroquinazoline (1.1 g) as an orange solid.