N,N-Diethylaniline → 5-tert-butyl-7-chloro-3-(2-chlorobenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine

Reaction equation

[C:1]([C:5]1[NH:10][C:9]2[N:11]([CH2:14][C:15]3[CH:20]=[CH:19][CH:18]=[CH:17][C:16]=3[Cl:21])[N:12]=[N:13][C:8]=2[C:7](=O)[N:6]=1)([CH3:4])([CH3:3])[CH3:2].C(N(CC)C1C=CC=CC=1)C.O=P(Cl)(Cl)[Cl:36]>>[C:1]([C:5]1[N:6]=[C:7]([Cl:36])[C:8]2[N:13]=[N:12][N:11]([CH2:14][C:15]3[CH:20]=[CH:19][CH:18]=[CH:17][C:16]=3[Cl:21])[C:9]=2[N:10]=1)([CH3:4])([CH3:3])[CH3:2]

Participants

Reactant 3

HCID 7061N,N-Diethylaniline

HCID 24813Phosphorus oxychloride

HCID 1784418645-tert-butyl-3-[(2-chlorophenyl)methyl]-4H-triazolo[4,5-d]pyrimidin-7-one

Product 1

HCID 866832845-tert-butyl-7-chloro-3-(2-chlorobenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine

Procedure

A mixture of 5-tert-butyl-3-(2-chlorobenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-7(4H)-one (12.3 mg, 38.7 μmol) and N,N-diethylaniline (12.3 μL, 77.4 μmol) in POCl3 (250 μL, 2.73 mmol) was refluxed for 3 h under N2 atmosphere. The reaction mixture was concentrated in vacuo, diluted with EtOAc, washed with cold H2O and brine, dried over Na2SO4 and concentrated in vacuo to afford crude 5-tert-butyl-7-chloro-3-(2-chlorobenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine. The residue was used for the next reaction without further purification.