Water → HCID 12792392, compound

A solution of 4-bromo-2-thiophenecarboxaldehyde (Aldrich, 1.20 g, 6.28 mmol) in 15 ml of anhydrous ethyl ether is brought to −70° C. in a flask fitted with a thermometer, under an atmosphere of argon and with magnetic stirring. Then a 1.6 M solution of MeLi in ether (4.12 ml, 6.59 mmol) is added drop by drop between −70° C. and −60° C. The reaction is followed by CCM (eluent ether:petroleum ether=20:80). The mixture is hydrolysed in the cold with 5 ml of saturated NH4Cl solution, 20 ml of distilled water is added and the mixture is extracted with ether (3×40 ml). The ether phase is dried over MgSO4, filtered and evaporated to obtain 1.28 g of a slightly yellowish oil, 4-bromo-2-(1′-hydroxyethyl)thiophene (gross yield=98.5%).

1. customfitted with a thermometer, under an atmosphere of argon and with magnetic stirring
2. additionis added
3. extractionthe mixture is extracted with ether (3×40 ml)
4. dry with materialThe ether phase is dried over MgSO4
5. filtrationfiltered
6. customevaporated

ORD record

ord-72923744f9d44aab854dbb2ec90c9c41

Source dataset

uspto-grants-2001_07

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06265423B1