Trimethylsilyldiazomethane → Methyl 3-[2-(2-{2-[2-(2-iodoacetylamino)ethoxy]ethoxy}ethoxy)ethoxy]propanoate

Participants

Reaction Conditions

Reaction Steps

117.4 mg of N-hydroxysuccinimidyl iodoacetate in solution in 3 ml of DCM are added to 100 mg of 3-(2-{2-[2-(2-aminoethoxy)ethoxy]ethoxy}ethoxy)propanoic acid. After 2 h at AT, 330 μl of MeOH are added and the mixture is cooled to 0° C. 360 μl of a 2M solution of trimethylsilyldiazomethane in hexane are added. After 1 h, the mixture is neutralized by addition of 50 μl of acetic acid and then a saturated aqueous NaHCO3 solution is added until pH=8 is obtained. The organic phase is dried over MgSO4 and concentrated under RP, and the residue is purified by flash chromatography on silica (Interchrom Puriflash Silica 15/35U 10G) using a gradient from 0 to 10% of methanol in DCM. 132 mg of methyl 3-[2-(2-{2-[2-(2-iodoacetylamino)ethoxy]ethoxy}ethoxy)ethoxy]propanoate are thus obtained.

Provenance & Evidence