Hydrogen Peroxide → 1-{4-Methyl-2-[4-(trifluoromethyl)phenyl]-1,3-thiazol-5-yl}butane-1,4-diol

To a solution of [rac]-1-[4-methyl-2-(4-trifluoromethyl-phenyl)-thiazol-5-yl]-but-3-en-1-ol [200 mg, 0.64 mmol; PCT Int. Appl. (2002), WO 02/062774 A1] in tetrahydrofuran (2 ml) was added a 1 M solution of borane-tetrahydrofuran complex in tetrahydrofuran (1.28 ml, 1.28 mmol) at ambient temperature under an argon atmosphere. The yellow solution was stirred for 1 h, water (1 ml), 3 M aqueous NaOH solution (0.2 ml) and 35% aqueous H2O2 solution (0.2 ml) were added and stirring was continued for 1 h. Water and ethyl acetate were added, the layers were separated and the aqueous layer was extracted with ethyl acetate. The combined organic layers were washed two times with brine and dried over sodium sulfate. The solvent was removed under reduced pressure to give 212 mg (0.64 mmol, quant.) of the title compound which was used in the next step without further purification.

1. stirringstirring
2. waitwas continued for 1 h
3. customthe layers were separated
4. extractionthe aqueous layer was extracted with ethyl acetate
5. washThe combined organic layers were washed two times with brine
6. dry with materialdried over sodium sulfate
7. customThe solvent was removed under reduced pressure

ORD-Eintrag

ord-46da300023184abaaf767da75b12e798

Quelldatensatz

uspto-grants-2007_06

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07235572B2