Reaktion #168719

Reaktionsgleichung

MeOH

chloroacetylchloride

2-Amino-2-(3-bromo-phenyl)-3,3-difluoro-propan-1-ol hydrochloride

Na2CO3

→

title compound

N-[1-(3-Bromo-phenyl)-2,2-difluoro-1-hydroxymethyl-ethyl]-2-chloro-acetamide

Lösungsmittel

dichloromethane

dichloromethane

TBME

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.ADDITIONwas added dropwise to the biphasic solution
2. 2
   workup.ADDITIONAfter the complete addition
3. 3
   workup.STIRRINGstirring
4. 4
   workup.WAITwas continued for 10 minutes
5. 5
   SonstigeThe phases were separated
6. 6
   Extraktionthe aqueous phase was extracted with TBME
7. 7
   WaschenThe organic phases were washed with water and brine
8. 8
   Trocknendried over Na2SO4
9. 9
   Einengenconcentrated under reduced pressure

Vorschrift

2-Amino-2-(3-bromo-phenyl)-3,3-difluoro-propan-1-ol hydrochloride (6.5 g, 24.43 mmol) was put between 60 ml aqueous 2 M Na2CO3 solution and 60 ml dichloromethane and cooled to 0° C. under strong stirring. Then chloroacetylchloride (2.94 ml, 36.6 mmol), diluted in 8 ml dichloromethane, was added dropwise to the biphasic solution. After the complete addition, the reaction was stirred for 30 minutes at r.t. After completion 10 ml MeOH were added and stirring was continued for 10 minutes. Then TBME und water were added. The phases were separated, and the aqueous phase was extracted with TBME. The organic phases were washed with water and brine, dried over Na2SO4 and concentrated under reduced pressure to yield the title compound as off-white solid. 1H-NMR (360 MHz, DMSO-d6): 8.72 (s, 1H), 7.53 (m, 2H), 7.35 (m, 2H), 6.48 (t, 1H, CHF2), 5.39 (t, 1H), 4.18 (m, 2H), 3.10 (s, 2H); MS: 342 [(M+H)+].

Quelle