2-Chloroethanol → 2-(5-Iodo-indol-1-yl)-ethanol

Beteiligte Stoffe

Reaktionsschritte

Under an N2 atmosphere 30 g (121 mmol) 5-iodoindole are added to a suspension of 27.1 g (484 mmol) KOH in 150 mL DMSO. The reaction mixture is kept for 1 h at RT, cooled to 0° C. with ice water, 9.7 mL (145 mmol) of 2-chloroethanol in 30 mL DMSO are slowly added dropwise and stirred for 4.5 h at RT. The reaction mixture is combined with 1 L EtOAc, washed four times with in each case 800 mL water and once with 400 mL saturated NaCl solution and the organic phase is dried over Na2SO4. After the desiccant and solvent have been eliminated the residue is purified by chromatography (silica gel, cyc/EtOAc 3:1).

Herkunft & Nachweise