Thiophosgene → 1202076-84-3

HRID 1177510Notes

Reaction equation

[Cl:1][C:2]1[C:3]([NH2:9])=[N:4][C:5]([Cl:8])=[CH:6][CH:7]=1.C(=O)([O-])[O-].[Na+].[Na+].[C:16](Cl)(Cl)=[S:17]>C(Cl)Cl>[Cl:1][C:2]1[C:3]([N:9]=[C:16]=[S:17])=[N:4][C:5]([Cl:8])=[CH:6][CH:7]=1

Participants

Conditions

Temperature: 55 °C

Procedure

A mixture of 3,6-dichloropyridin-2-amine (0.772 g, 4.74 mmol), sodium carbonate (2.01 g, 18.9 mmol), and thiophosgene (0.726 mL, 9.47 mmol) in 6 mL DCM was heated to 55° C. in a sealed tube for 36 h. The reaction was filtered through a frit, rinsing with DCM, and the material was adsorbed onto 6 g silica gel and dried. The material was purified by silica gel chromatography, 40 g, 0-100% EA/hexanes to give 3,6-dichloro-2-isothiocyanatopyridine. 1H NMR (400 MHz, DMSO-d6) 8 ppm 8.19 (d, J=8.5 Hz, 1 H), 7.59 (d, J=9.5 Hz, 1 H).

Workup

filtrationThe reaction was filtered through a frit
washrinsing with DCM
customdried
customThe material was purified by silica gel chromatography, 40 g, 0-100% EA/hexanes

Sources & evidence

ORD record: ord-a27c9952527343d798d4d78fdd80ee65
Source dataset: uspto-grants-2010_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07842685B2

Reaction notes

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