1-(Prop-2-en-1-yl)cyclopropane-1-sulfonyl chloride → 1-Allyl-cyclopropanesulfonic acid [7-(2-fluoro-4-iodo-phenylamino)-6-methyl-5-oxo-2,3-dihydro-5H-oxazolo[3,2-a]pyridin-8-yl]-amide

Participants

Reaction Steps

Using the same reaction conditions and workup as described for the preparation of Example 7A, 8-amino-7-(2-fluoro-4-iodo-phenylamino)-6-methyl-2,3-dihydro-oxazolo[3,2-a]pyridin-5-one (I-7f: 0.46 g, 0.001 mol) in dry pyridine (3 mL) was reacted with 1-allyl-cyclopropane sulfonyl chloride (0.25 g, 0.0014 mol) to afford the crude product. Purification by column chromatography on silica gel (2% MeOH in DCM) afforded 0.19 g of the product (30% yield).

Provenance & Evidence