Triethylamine → 2-Azidoethyl methanesulfonate

Temperature

23 °C

A solution of bromoethanol (7.5 g, 60.0 mmol) and sodium azide (5.0 g, 76.9 mmol) in HMPT (30 ml) was heated at 115° C. for 2.5 h. The reaction mixture was cooled to 23° C. and diluted with CH2Cl2 (100 ml). The solids were removed by filtration and the CH2Cl2 was evaporated on the rotary evaporator leaving a yellow liquid which was cooled to 0° C. and successively treated with mesylchloride (5.57 ml, 72.0 mmol) and triethylamine (10.0 ml, 72.0 mmol). The reaction mixture was stirred at 0° C. for 1 h, then at 23° C. for 6 h, and poured into H2O (300 ml). The aqueous solution was extracted with ether (1×200 ml, 4×100 ml); the ether extracts were combined, washed with 1N HCl solution, H2O saturated NaHCO3 solution and H2O, dried over anhydrous MgSO4 and concentrated on a rotary evaporator to an orange liquid which was distilled under high vacuum bp 95°-100° C. 0.3 torr, 5.8 g, 58.5%; ir (neat) νmax : 2005 (s, N3), 1345 (s, SO2 --O), 1175 (m, SO2 --O) cm-1. 1Hmr (CDCl3) δ: 3.03 (s, 3H, OCH3), 3.43-3.76 (m, 2H, H-2) and 4.2-4.46 ppm (m, 2H, H-1).

1. customThe solids were removed by filtration
2. customthe CH2Cl2 was evaporated on the rotary evaporator
3. customleaving a yellow liquid which
4. temperaturewas cooled to 0° C.
5. waitat 23° C. for 6 h
6. extractionThe aqueous solution was extracted with ether (1×200 ml, 4×100 ml)
7. washwashed with 1N HCl solution, H2O saturated NaHCO3 solution and H2O
8. dry with materialdried over anhydrous MgSO4
9. concentrationconcentrated on a rotary evaporator to an orange liquid which
10. distillationwas distilled under high vacuum bp 95°-100° C

ORD record

ord-e35d1344be5d4bcba9915b28ffb0a57a

Source dataset

uspto-grants-1983_03

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US04378314