Trifluoroacetic acid → 1-Allyl-3-(4,5,6,7-tetrahydro-thiazolo(5,4-c)pyridin-2-yl)-urea

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Reaction Steps

10% TFA in 60 ml chloroform was added to 2.5 g 2-(3-allyl-ureido)-6,7-dihydro-4H-thiazolo (5,4-c) pyridine-5-carboxylic acid tert-butyl ester in 28 ml chloroform and stirred for 2 h at RT. The mixture was concentrated, the residue was diluted with chloroform and basified with 2.5 M aqueous potassium carbonate solution and extracted with chloroform. The organic layer was concentrated. The residue was washed with a mixture 50% ethyl acetate and 50% hexane to yield 1.7 g of the desired product. (M+H)+: 239

Provenance & Evidence