Ethyl Acetate → HCID 22678860, compound

HRID 1872435Notes

Reaction equation

[CH2:1]([C:5](O)([CH2:13][CH2:14][CH2:15][CH3:16])[C:6]1[CH:11]=[CH:10][C:9]([F:12])=[CH:8][CH:7]=1)[CH2:2][CH2:3][CH3:4].[Br-].[Br:19][P+](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.S([O-])([O-])=O.[Na+].[Na+].C(OCC)(=O)C>CN(C=O)C>[CH2:1]([C:5]([Br:19])([CH2:13][CH2:14][CH2:15][CH3:16])[C:6]1[CH:11]=[CH:10][C:9]([F:12])=[CH:8][CH:7]=1)[CH2:2][CH2:3][CH3:4]

Participants

Conditions

Temperature: 0 °C

Procedure

To a solution of 8.1 g (25 mmol) of benzyl alcohol obtained from Step 2 in 100 mL of DMF at -40 C. was added 47 g (50 mmol) of bromotriphenyphosphonium bromide (Aldrich). The resulting solution was stirred cold for 30 min, then was allowed to warm to 0° C. To the mixture was added 10% solution of sodium sulfite and ethyl acetate. The extract was washed a few times with water, dried (MgSO4), and concentrated in vacuo. The mixture was stirred in small amount of ethyl acetate/hexane mixture (1:4 ratio) and filtered through a pad of silica gel, eluting with same solvent mixture. The combined filtrate was concentrated in vacuo to give 9.5 g (98%) of the desired product as a colorless oil: 1H NMR (CDCl3) d 0.88 (t, J=7.05 Hz, 6H), 1.0-1.4 (m, 8H), 1.55-1.78 (m, 4H), 3.11 (s, 2H), 4.67 (s, 2H), 7.02 (dt, J=8.46, 3.02 Hz, 1H), 7.15 (dd, J=9.47, 2.82 Hz, 1H), 7.46 (dd, J=8.67, 5.64, 1H), 9.45 (s, 1H).

Workup

washThe extract was washed a few times with water
dry with materialdried (MgSO4)
concentrationconcentrated in vacuo
stirringThe mixture was stirred in small amount of ethyl acetate/hexane mixture (1:4 ratio)
filtrationfiltered through a pad of silica gel
washeluting with same solvent mixture
concentrationThe combined filtrate was concentrated in vacuo

Sources & evidence

ORD record: ord-ea56f156374641e1a6e07a8e4bfaaea6
Source dataset: uspto-grants-2000_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06107494

Reaction notes

Loading…