Phosphorus sulfide (P2S5) → HCID 86663792, compound

Reaction equation

[CH3:1][N:2]1[C:7](=[O:8])[N:6]2[CH:9]=[N:10][C:11]([C:12]([NH:14][C:15]3[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=3)=O)=[C:5]2[N:4]=[N:3]1.P12(SP3(SP(SP(S3)(S1)=S)(=S)S2)=S)=[S:22].C[Si](C)(C)O[Si](C)(C)C>C(Cl)Cl>[CH3:1][N:2]1[C:7](=[O:8])[N:6]2[CH:9]=[N:10][C:11]([C:12](=[S:22])[NH:14][C:15]3[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=3)=[C:5]2[N:4]=[N:3]1

Participants

Procedure

A mixture of 3-methyl-4-oxo-N-phenyl-3,4-dihydroimidazo[5,1-d][1,2,3,5]tetrazine-8-carboxamide (430 mg, 1.59 mmol), phosphorus pentasulfide (212 mg, 0.48 mmol) and hexamethyldisiloxane (680 μL, 3.18 mmol) in DCM (20 mL) was refluxed overnight. The crude product was absorbed on silica and was purified by flash chromatography using a gradient elution of DCM:MeOH (100:0 to 98:2) to give 372 mg of 3-methyl-4-oxo-N-phenyl-3,4-dihydroimidazo[5,1-d][1,2,3,5]tetrazine-8-carbothioamide as a 1.5:1 inseparable mixture with the starting material.