Hydrogen Sulfide → 1,9-dimethyl-10H-phenothiazine

HRID 408108

Reaktionsgleichung

[C:1]1([CH3:15])[CH:6]=[CH:5][CH:4]=[CH:3][C:2]=1[NH:7][C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][C:9]=1[CH3:14].[S].II.[SH2:19]>ClC1C=CC=CC=1Cl>[CH3:14][C:9]1[C:8]2[NH:7][C:2]3[C:3](=[CH:4][CH:5]=[CH:6][C:1]=3[CH3:15])[S:19][C:13]=2[CH:12]=[CH:11][CH:10]=1

Komponenten

Reaktionsbedingungen

Temperatur: 180 °C

Versuchsvorschrift

To a reaction vessel were combined di(2-tolyl)amine (11.7 g, 59.3 mmol), elemental sulfur (3.9 g, 121.65 mmol, 2 eq.), crushed iodine (0.44 g, 1.73 mmol, 3 mol %) followed by o-dichlorobenzene (22 mL). Added an outlet to a dilute bleach solution (for hydrogen sulfide evolution) then put under argon. Refluxed at 180° C. for 4 h and removed solvent under reduced pressure. Purified by column chromatography with 2.0% ethyl acetate/98% hexane to obtain the desired product as white crystals (2 g, 8.8 mmol, 15% yield). Alternatively, the reaction was cooled to about 60° C. then hexane was added for extraction. Repeated hot hexane extractions of reaction until the product was no longer obtained in residue (about four times). Combined hexane extractions and concentrated in vacuo. Purified resulting residue either through repeated hot acetone/isopropanol crystallizations (or triturations) or flash column chromatography using 2% ethyl acetate/98% hexane to obtain product as white crystals (2.92 g, 12.8 mmol, 28% yield).

Aufarbeitung

customTo a reaction vessel were combined
customremoved solvent under reduced pressure
customPurified by column chromatography with 2.0% ethyl acetate/98% hexane

Quellen und Nachweise

ORD-Eintrag: ord-3176436d63ff43128bda32f193290546
Quelldatensatz: uspto-grants-2014_06
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US08759336B2

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