Phosphorus sulfide (P2S5) → 6-Methyl-2-(2-nitrophenyl)thiazolo[5,4-b]pyridine

HRID 1667034Notes

Reaction equation

Cl[C:2]1[C:7]([NH:8][C:9](=O)[C:10]2[CH:15]=[CH:14][CH:13]=[CH:12][C:11]=2[N+:16]([O-:18])=[O:17])=[CH:6][C:5]([CH3:20])=[CH:4][N:3]=1.P12(SP3(SP(SP(S3)(S1)=S)(=S)S2)=S)=[S:22]>N1C=CC=CC=1.CC1C=CC(C)=CC=1>[CH3:20][C:5]1[CH:6]=[C:7]2[N:8]=[C:9]([C:10]3[CH:15]=[CH:14][CH:13]=[CH:12][C:11]=3[N+:16]([O-:18])=[O:17])[S:22][C:2]2=[N:3][CH:4]=1

Participants

Conditions

Temperature: 140 °C

Procedure

A mixture of N-(2-chloro-5-methylpyridin-3-yl)-2-nitrobenzamide (5.0 g, 17.1 mmol) and P2S5 (7.6 g, 34.2 mmol) in pyridine (50 mL) and p-xylene (200 mL) was stirred at 140° C. for 20 h. The hot solution was transferred to another flask and the solvent was removed in vacuo. The residue was purified by recrystallization from EtOH to afford 6-methyl-2-(2-nitrophenyl)thiazolo[5,4-b]pyridine as a yellow solid (3.5 g, yield: 75%).

Workup

customThe hot solution was transferred to another flask
customthe solvent was removed in vacuo
customThe residue was purified by recrystallization from EtOH

Sources & evidence

ORD record: ord-06e1b6b9497e4d7daf831f1558d39d2c
Source dataset: uspto-grants-2011_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08044198B2

Reaction notes

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