Reaktion #572409

Reaktionsgleichung

N-methylthiomorpholine

methanesulfonic acid

ethylene sulfide

→

thiol

Ausbeute 86.0%

N- methyl-N-(2-mercaptoethyl)-thiomorpholinium methanesulfonate

Ausbeute 86.0%

Lösungsmittel

water

Reaktionsbedingungen

Aufarbeitung

1. 1
   WaschenThe aqueous solution was washed with diethyl ether (3×25 mL)
2. 2
   workup.ADDITIONpoured over a silica gel reverse phase column
3. 3
   Waschenthe title compound being eluted with water
4. 4
   Sonstigeevaporated

Vorschrift

To precooled (ice bath) N-methylthiomorpholine* (500 g, 42.7 mmol) was added methanesulfonic acid (1.47 mL, 20.5 mmol) and ethylene sulfide (1.30 mL, 21.4 mmol). The mixture was heated at 65° C. for 24 h and diluted with water (25 mL). The aqueous solution was washed with diethyl ether (3×25 mL), pumped under vacuum and poured over a silica gel reverse phase column; the title compound being eluted with water. The appropriate fractions were combined and evaporated to afford the thiol as an oil (4.80 g, yield 86%); ir (film) νmax : 2550 cm-1 (w,SH); 1Hmr (DMSO d6)δ: 3.25-2.95 (6H, m, CH2N⊕), 3.32 (3H, s, CH3N⊕), 3.20-2.65 (7H, m, CH2S, SH) and 2.32 ppm (3H, s, CH3SO3).

Quelle