1,2-Dichloroethane → 3-[4-(tert-Butyl-dimethyl-silanyloxymethyl)-phenyl]-2-ethoxy-propionic acid 2,2,2-trichloro-ethyl ester

HRID 709473Notes

Reaction equation

HRID 709473 reaction equation
[C:1]([SiH2:5][O:6][C:7]([CH3:23])([CH3:22])[C:8]1[CH:13]=[CH:12][C:11]([CH2:14][CH:15]([O:19][CH2:20][CH3:21])[C:16]([OH:18])=[O:17])=[CH:10][CH:9]=1)([CH3:4])([CH3:3])[CH3:2].[Cl:24][C:25]([Cl:29])([Cl:28])[CH2:26]O.C(Cl)CCl.Cl>C(Cl)Cl.CN(C1C=CN=CC=1)C>[Cl:24][C:25]([Cl:29])([Cl:28])[CH2:26][O:17][C:16](=[O:18])[CH:15]([O:19][CH2:20][CH3:21])[CH2:14][C:11]1[CH:12]=[CH:13][C:8]([C:7]([CH3:22])([CH3:23])[O:6][SiH2:5][C:1]([CH3:3])([CH3:4])[CH3:2])=[CH:9][CH:10]=1

Participants

7

Reactant 4

HCID 111,2-DichloroethaneHCID 313Hydrochloric AcidHCID 8259TrichloroethanolHCID 1317316813-[4-(tert-Butyl-dimethyl-silanyloxymethyl)-phenyl]-2-ethoxy-propionic acid

Product 1

HCID 1317316833-[4-(tert-Butyl-dimethyl-silanyloxymethyl)-phenyl]-2-ethoxy-propionic acid 2,2,2-trichloro-ethyl ester

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6344DichloromethaneSolvent2×

Procedure

Under nitrogen atmosphere 3-[4-(tert-butyl-dimethyl-silanyloxymethyl)-phenyl]-2-ethoxy-propionic acid (0.135 g, 0.4 mmol) and 2,2,2-trichloro ethanol (0.06 g, 0.4 mmol) were dissolved in dry DCM (5 mL) and DMAP (2 mg, 0.02 mmol) was added followed by EDC×HCl (0.092 g, 0.48 mmol) at 0° C. The mixture was stirred for 18 h at ambient temperature, then diluted with DCM and extracted with aq. HCl (2N) and water. The organic layer was separated, dried (MgSO4) and evaporated to afford the crude product which was used in the next step without further purification (0.176 g, 93.6%). 1H NMR (400 MHz, CDCl3): δ 7.12-7.19 (m, 4H), 4.62-4.71 (q, 2H), 4.63 (s, 2H), 4.05-4.08 (m, 1H), 3.55-3.59 (m, 1H), 3.27-3.31 (m, 1H), 2.92-3.03 (m, 2H), 1.08 (t, 3H).

Workup

  1. extractionextracted with aq. HCl (2N) and water
  2. customThe organic layer was separated
  3. dry with materialdried (MgSO4)
  4. customevaporated

Sources & evidence

ORD record
ord-23d17f35d2024aa484e18e2ab626d806
Source dataset
uspto-grants-2015_11
Patent number
US09181181B2

Reaction notes

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