Reacción #93237

Ecuación de reacción

triethylamine

2-chloroethanol

methanesulfonyl chloride

→

2-Chloroethyl (Methylsulfonyl)methanesulfonate

Disolventes

acetonitrile

acetonitrile

acetonitrile

Condiciones de reacción

Tratamiento posterior

1. 1
   Otrofrom rising above -30° C
2. 2
   workup.STIRRINGThe resulting mixture was stirred for 2 hours at -30° to -40° C.
3. 3
   Filtraciónwas filtered
4. 4
   Otroto separate triethylamine hydrochloride
5. 5
   LavadoThe latter material was washed with ethyl acetate
6. 6
   Concentraciónthe organic solution was concentrated in vacuo to an oil
7. 7
   LavadoA solution of the residual oil in ethyl acetate (1200 ml) was washed quickly with two portions (2×200 ml) of dilute sodium chloride solution
8. 8
   Secadowith two portions (2×200 ml) of saturated sodium chloride solution, dried with magnesium sulfate
9. 9
   Filtraciónfiltered
10. 10
    Concentraciónconcentrated in vacuo
11. 11
    workup.DISSOLUTIONThe residual solid (70 g) was dissolved in methylene chloride (450 ml)
12. 12
    Filtraciónthe solution was filtered
13. 13
    workup.ADDITIONdiluted slowly with cyclohexane (450 ml)
14. 14
    workup.WAITto stand at room temperature for about an hour
15. 15
    Otrowas then stored at low temperatures (about 5° C.) overnight
16. 16
    FiltraciónThe precipitate was collected by filtration
17. 17
    Lavadowashed with cyclohexane
18. 18
    Secadodried in vacuo over phosphorus pentoxide
19. 19
    Otroyield
20. 20
    OtroIR (cm-1, medium and strong bands) 3040, 3025, 2990 s, 2930, 2935 sh, 1465, 1430, 1415, 1390, 1370 s, 1320 s, 1240, 1200, 1185 s, 1175 s, 1165 s, 1125, 1070, 990 s, 955 s, 915 s, 870 s, 790 s, 765, 755, 665, 605 sh, 600, 525 s, 505, 465 s, 420

Procedimiento

A solution of 133 g (1.32 mol.) of triethylamine in 400 ml of anhydrous acetonitrile was cooled to -30° to -40° C., and a solution of 100 g (0.88 mol.) of methanesulfonyl chloride in anhydrous acetonitrile (67 ml) was added dropwise at a rate that prevented the temperature from rising above -30° C. The mixture was stirred at -30° to -40° C. for 1 hour, and a solution of 35.4 g of 2-chloroethanol in anhydrous acetonitrile (30 ml) was added. The resulting mixture was stirred for 2 hours at -30° to -40° C. and then was filtered to separate triethylamine hydrochloride. The latter material was washed with ethyl acetate, the washings were combined with the filtrate, and the organic solution was concentrated in vacuo to an oil. A solution of the residual oil in ethyl acetate (1200 ml) was washed quickly with two portions (2×200 ml) of dilute sodium chloride solution and then with two portions (2×200 ml) of saturated sodium chloride solution, dried with magnesium sulfate, filtered, and concentrated in vacuo. The residual solid (70 g) was dissolved in methylene chloride (450 ml), the solution was filtered and diluted slowly with cyclohexane (450 ml). The mixture, protected from atmospheric moisture, was allowed to stand at room temperature for about an hour and was then stored at low temperatures (about 5° C.) overnight. The precipitate was collected by filtration, washed with cyclohexane, and dried in vacuo over phosphorus pentoxide: yield, 58.7 g (56%); m.p. 60°-62° C.; IR (cm-1, medium and strong bands) 3040, 3025, 2990 s, 2930, 2935 sh, 1465, 1430, 1415, 1390, 1370 s, 1320 s, 1240, 1200, 1185 s, 1175 s, 1165 s, 1125, 1070, 990 s, 955 s, 915 s, 870 s, 790 s, 765, 755, 665, 605 sh, 600, 525 s, 505, 465 s, 420; 1H NMR (300.6 MHz, CDCl3, Me4Si as internal reference), δ3.26 (s, CH3), 3.80 (t, CH2Cl), 4.65 (t, OCH2), 4.67 (s, SCH2S). Anal. Calcd. for C4H9ClO5S2C, 20.30; H, 3.83. Found: C, 20.26; H, 4.00.

Fuente