Bromine → 2-(5-Bromo-1,3-thiazol-2-yl)propan-2-ol

To a solution of 2-(1-methyl-1-{[2-(trimethylsilyl)ethoxy]methoxy}ethyl)thiazole from Step 2 in chloroform (2 mL mmol) at room temperature was added bromine (2 molar eq) and the resulting mixture was stirred for 1 hour. Solid sodium bicarbonate (0.55 eq) was added and the mixture was stirred for 5 hours. More sodium bicarbonate was added (0.55 eq) and stirring was continued for 18 hours. After a final addition of sodium bicarbonate (0.55 eq) the mixture was stirred for a further 5 hours, diluted with chloroform and the organic phase was washed with saturated aqueous sodium bicarbonate, then with water, dried and evaporated. The crude material was chromatographed, eluting with a 3:7 mixture of ethyl acetate and hexane to afford the desired product.

1. stirringthe mixture was stirred for 5 hours
2. stirringstirring
3. waitwas continued for 18 hours
4. stirringwas stirred for a further 5 hours
5. washthe organic phase was washed with saturated aqueous sodium bicarbonate
6. dry with materialwith water, dried
7. customevaporated
8. customThe crude material was chromatographed
9. washeluting with a 3:7 mixture of ethyl acetate and hexane

ORD record

ord-df6ba86e611b4bdba81cf201b740623b

Source dataset

uspto-grants-2004_06

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06743802B2