Diazomethane → HCID 68441200, compound

Participants

Reaction Steps

4 ml of a solution of diazomethane in ether (0.2M) are added dropwise to a solution of 0.12 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 2 ml of methanol at 0° C. The reaction mixture is worked up after 3.5 hours by quenching with solid magnesium sulfate to decompose any excess diazomethane, filtering and concentrating under reduced pressure to afford the crude title compound as a pale yellow solid with was used in the next step without any further purification. Rf=0.78 (EtOAc); Rt=5.26.

Provenance & Evidence