2-羟基-3-甲氧基丙腈

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 27.3 gr (0.27 Mol) of 2-hydroxy-3-methoxy-propionitrile was dissolved dichloromethane (250 ml) and treated first with 56.4 ml (0.40 Mol) triethylamine keeping the temperature below −8° C., followed by dropwise addition of 23.1 ml (0.297 mol) methansulfonyl chloride keeping the temperature below +7° C. under cooling. After the exothermic reaction ceased the mixture was left to reach room-temperature. Water was stirred in, and the mixture was extracted with tert.-butylmethylether, washed with brine, dried and evaporated. To remove some polar side-products the crude liquid obtained was filtered through silica gel (eluent: cyclohexane/ethylacetate 1:1). Methanesulfonic acid 1-cyano-2-methoxy-ethyl ester of 89% purity (GC-MS) was obtained; 1H-NMR (CDCl3): 5.33, t, 1H, 3.81, d, 2H, 3.48, s, 3H, 3.21, s, 3H. under cooling After the exothermic reaction was left was extracted with tert.-butylmethylether washed with brine dried evaporated To remove some polar side-products the crude liquid obtained was filtered through silica gel (eluent: cyclohexane/ethylacetate 1:1)