Dimethylbarbituric acid → 4-(2-[1,2,3]Triazol-1-yl-ethanesulfinylmethyl)-phenol

Temperature

50 °C

A solution of 1.00 g (3.43 mmol) 1-[2-(4-allyloxy-phenylmethanesulfinyl)-ethyl]-1H-[1,2,3]triazole in 60 ml dichloromethane was added to a solution of 1.61 g (10.3 mmol) 1,3-dimethylbarbituric acid and 102 mg (0.09 mmol) Pd(PPh3)4 in 30 ml dichloromethane and stirred for 5 h at 50° C. The mixture was extracted with 3×50 ml sat. NaHCO3-solution and 20 ml water. The organic phase was discarded and the aqueous phase acidified with 2M HCl to pH=4, concentrated to a volume of 50 ml and adjusted to pH=1. After five extractions with ethyl acetate, the organic extracts were combined and dried over MgSO4. After evaporation the residue was purified by chromatography on silica gel (dichloromethane/methanol 100:2) to yield 0.84 g (97%) of 4-(2-[1,2,3]Triazol-1-yl-ethanesulfinylmethyl)-phenol.

1. extractionThe mixture was extracted with 3×50 ml sat. NaHCO3-solution and 20 ml water
2. concentrationconcentrated to a volume of 50 ml
3. extractionAfter five extractions with ethyl acetate
4. dry with materialdried over MgSO4
5. customAfter evaporation the residue
6. customwas purified by chromatography on silica gel (dichloromethane/methanol 100:2)

ORD record

ord-d9c2db7229934015a6ccd109b303a010

Source dataset

uspto-grants-2008_09

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07429605B2