Carbon tetrabromide → HCID 23433529, compound

HRID 1939486Notes

Reaction equation

HRID 1939486 reaction equation
[C:1]([O:5][C:6]([N:8]1[C:17]2[C:12](=[CH:13][C:14]([C:18]3[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=3)=[CH:15][CH:16]=2)[C:11]([CH2:24]O)=[CH:10][C:9]1([CH3:27])[CH3:26])=[O:7])([CH3:4])([CH3:3])[CH3:2].C(Br)(Br)(Br)[Br:29].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>ClCCl>[C:1]([O:5][C:6]([N:8]1[C:17]2[C:12](=[CH:13][C:14]([C:18]3[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=3)=[CH:15][CH:16]=2)[C:11]([CH2:24][Br:29])=[CH:10][C:9]1([CH3:27])[CH3:26])=[O:7])([CH3:4])([CH3:3])[CH3:2]

Participants

5

Reactant 3

HCID 11205Carbon tetrabromideHCID 11776TriphenylphosphineHCID 23433604HCID 23433604, compound

Product 1

HCID 23433529HCID 23433529, compound

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

To a solution of N-tert-butyloxycarbonyl-1,2-dihydro-2,2-dimethyl-4hydroxymethyl-6-phenylquinoline (structure 11, where R1 =phenyl) (230 mg, 0.630 mmol) and carbon tetrabromide (220 mg, 0.662 mmol) in 5 mL of dichloromethane at 0° C. was added triphenylphosphine (174 mg, 0.662 mmol) in 2 mL of dichloromethane. The reaction mixture was allowed to warm to rt and stirred for 1 h. The mixture was concentrated in vacuo to a residue that was subjected to flash chromatography (silica gel, hexane/ethyl acetate, 9:1) to give structure 12, where R1 =phenyl (72 mg, 27%). 1 H NMR (acetone d6) 7.67 (m, 3H), 7.52 (dd, J=8.7, 2.1, 1H), 7.45 (t, 2H), 7.32 (m, 2H), 6.07 (s, 1H), 4.60 (s, 2H), 1.55 (s, 6H), 1.53 (s, 9H).

Workup

  1. concentrationThe mixture was concentrated in vacuo to a residue that
  2. customto give structure 12, where R1 =phenyl (72 mg, 27%)

Sources & evidence

ORD record
ord-00b45d2603244b6e9d84efcdcae73811
Source dataset
uspto-grants-1997_12
Patent number
US05696130

Reaction notes

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