Diazomethane → HCID 68441200, compound

Participants

Reaction Steps

To a solution of 2.03 g of [(2R,4R,5R)-4-(4-methoxy-phenyl)-5-[4-(3-methoxy-propyl)-3,4-dihydro-2H-benzo[1,4]oxazin-6-ylmethoxy]-1-(toluene-4-sulfonyl)-piperidin-2-yl]-acetic acid (from example 25f) in 50 ml of methanol at 0° C. is added a 0.1M solution of diazomethane in ether until the conversion to the methyl ester is complete. The reaction mixture is treated with magnesium sulfate to destroy the excess of diazomethane. The solids are removed by filtration and the organic layer is concentrated under reduced pressure. The residue is purified by flash chromatography (SiO2 60 F) to afford the title compound as a yellow oil. Rf=0.24 (EtOAc-heptane 1:1); Rt=5.24.

Provenance & Evidence