Process for preparing 1-tertiary-alkyl-3-(substituted...

Details Process for preparing 1-tertiary-alkyl-3-(substituted... Process for preparing 1-tertiary-alkyl-3-(substituted...

C - Chemistry, Metallurgy

07

D

260/363.3

C07D 307/58 (2006.01) C07D 307/60 (2006.01) C07D 307/66 (2006.01)

Patent

CA 1097365

274,514 ABSTRACT Process for preparing 1-tertiary-alkyl-3- (substituted furyl )-urea antihypertensives, such as N-(2,5-dihydro-2-methyl-5-oxo-3-furanyl)-N'-(1,1- dimethylethyl)-urea, by contacting an appropriately sub- stituted 2,4-furandione with a phenylhydrazine, cleaving the resulting 4-(2-phenylhydrazino)-2(5H)-furanone by catalytic hydrogenation to give a 4-amino-2(5H)- furanone, then contacting this with an appropriate tertiary- alkyl isocyanate.

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