(Diethylamino)sulfur trifluoride → Tert-butyl 3-(3-bromophenyl)-3-fluoropropylcarbamate

HRID 2172814Notes

Reaction equation

HRID 2172814 reaction equation
C(N(S(F)(F)[F:7])CC)C.[Br:10][C:11]1[CH:12]=[C:13]([CH:17](O)[CH2:18][CH2:19][NH:20][C:21](=[O:27])[O:22][C:23]([CH3:26])([CH3:25])[CH3:24])[CH:14]=[CH:15][CH:16]=1>>[Br:10][C:11]1[CH:12]=[C:13]([CH:17]([F:7])[CH2:18][CH2:19][NH:20][C:21](=[O:27])[O:22][C:23]([CH3:26])([CH3:25])[CH3:24])[CH:14]=[CH:15][CH:16]=1

Participants

3

Reactant 2

HCID 123472(Diethylamino)sulfur trifluorideHCID 57608439Tert-butyl 3-(3-bromophenyl)-3-hydroxypropylcarbamate

Product 1

HCID 66743475Tert-butyl 3-(3-bromophenyl)-3-fluoropropylcarbamate

Conditions

Temperature
-78 °C

Procedure

Diethylaminosulphur trifluoride (DAST) is added under an inert atmosphere to a cold (−78° C.) solution of alcohol 39. The reaction mixture is stirred at −78° C. until no starting material is seen by TLC. The reaction mixture is partitioned between water and EtOAc, and aqueous layer is extracted with EtOAc. The combined organic layers are washed with brine and dried over anhydrous MgSO4. Purification by flash chromatography gives tert-butyl 3-(3-bromophenyl)-3-fluoropropylcarbamate.

Workup

  1. customThe reaction mixture is partitioned between water and EtOAc, and aqueous layer
  2. extractionis extracted with EtOAc
  3. washThe combined organic layers are washed with brine
  4. dry with materialdried over anhydrous MgSO4
  5. customPurification by flash chromatography

Sources & evidence

ORD record
ord-9c9b2ae9c8b4463cba8895b1265c49a2
Source dataset
uspto-grants-2015_06
Patent number
US09056849B2

Reaction notes

Loading…