反应详情

The above prepared 4-allyl-2-(4-methoxy-phenyl)-5-methyl-oxazole (4.51 g, 19.7 mmol) was dissolved in 60 ml of abs. THF and and treated at 0° with 100 ml of 9-BBN-solution (0.5 M hexane). Hydroboration was allowed to proceed for 2 h at RT. Afterwards, 56 ml of 3N NaOH and 114.5 ml of 30% H2O2 was added simultaneously, whereby the internal temperature rose to 45°. After 1 h, the heterogeneous mixture was diluted with ice and water, extracted twice with AcOEt, washed water, and dried over natrium sulfate. Evaporation of the solvents, followed by flash chromatography (SiO2, hexane/AcOEt=1/3) yielded 4.54 g of the title compound as colorless oil.

1. dissolutionwas dissolved in 60 ml of abs
2. customrose to 45°
3. waitAfter 1 h
4. extractionextracted twice with AcOEt
5. washwashed water
6. dry with materialdried over natrium sulfate
7. customEvaporation of the solvents