Formic Acid → methyl (3S)-3-hydroxy-3-(thiophen-2-yl)propanoate

Temperature

36 °C

In a 1 l multinecked flask equipped with a sparging stirrer, reflux condenser and internal thermometer, an HCOOH/Et3N mixture (molar ratio 1:1) is prepared by gradually adding 41 ml of HCOOH dropwise within 20 min to 152 ml of Et3N with stirring and ice cooling. 190 g of methyl 2-oxo-3-(2-thienyl)propionate are added to this biphasic mixture, the homogeneous yellow solution is admixed with 0.1 l of dichloromethane and the entire mixture is degassed by passing through argon for 20 min. It is heated to 36° C. and the dark red catalyst solution is added all at once to the reaction mixture with vigorous stirring. Stirring is effected at 800 rpm while passing argon through the reaction mixture for 14 h.

1. customequipped with a sparging stirrer
2. temperaturereflux condenser
3. customthe entire mixture is degassed
4. additionthe dark red catalyst solution is added all at once to the reaction mixture with vigorous stirring
5. stirringStirring
6. customfor 14 h.

ORD record

ord-6c96bfe041bd4053b8dc9a3953f3cccc

Source dataset

uspto-grants-2009_09

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07582776B2