Triphenylphosphine → (E)-4-(1,3-dihydro-6-methoxy-4-methoxyethoxymethoxy-7-methyl-3-oxoisobenzofuran-5-yl)-2-methylbut-2-enyl bromide

HRID 1781535Notes

Reaction equation

HRID 1781535 reaction equation
[CH3:1][O:2][C:3]1[C:11]([CH3:12])=[C:10]2[C:6]([C:7](=[O:13])[O:8][CH2:9]2)=[C:5]([O:14][CH2:15][O:16][CH2:17][CH2:18][O:19][CH3:20])[C:4]=1[CH2:21]/[CH:22]=[C:23](\[CH3:26])/[CH2:24]O.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[Br:46]N1C(=O)CCC1=O>C(Cl)Cl>[CH3:1][O:2][C:3]1[C:11]([CH3:12])=[C:10]2[C:6]([C:7](=[O:13])[O:8][CH2:9]2)=[C:5]([O:14][CH2:15][O:16][CH2:17][CH2:18][O:19][CH3:20])[C:4]=1[CH2:21]/[CH:22]=[C:23](\[CH3:26])/[CH2:24][Br:46]

Participants

5

Reactant 3

HCID 11776TriphenylphosphineHCID 67184N-bromobutanimideHCID 70303929(E)-4-(1,3-dihydro-6-methoxy-4-methoxyethoxymethoxy-7-methyl-3-oxoisobenzofuran-5-yl)-2-methylbut-2-en-1-ol

Product 1

HCID 67019128(E)-4-(1,3-dihydro-6-methoxy-4-methoxyethoxymethoxy-7-methyl-3-oxoisobenzofuran-5-yl)-2-methylbut-2-enyl bromide

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a solution of (E)-4-(1,3-dihydro-6-methoxy-4-methoxyethoxymethoxy-7-methyl-3-oxoisobenzofuran-5-yl)-2-methylbut-2-en-1-ol (4.6 g) in methylene chloride (100 ml) at 0° C. was added triphenylphosphine (3.64 g) then N-bromosuccinimide (2.48 g). After 15 minutes the solution was washed with 10% aqueous sodium bisulphite, water, aqueous sodium bicarbonate, then dried and evaporated. The residue was chromatographed on silica gel, eluting with 4:1 hexane: ethyl acetate, to give (E)-4-(1,3-dihydro-6-methoxy-4-methoxyethoxymethoxy-7-methyl-3-oxoisobenzofuran-5-yl) -2-methylbut-2-enyl bromide, mp 74°-75° C. (hexane).

Workup

  1. washAfter 15 minutes the solution was washed with 10% aqueous sodium bisulphite, water, aqueous sodium bicarbonate
  2. customdried
  3. customevaporated
  4. customThe residue was chromatographed on silica gel
  5. washeluting with 4:1 hexane

Sources & evidence

ORD record
ord-3d832c1fcf3c483f83810b22f9dee1dd
Source dataset
uspto-grants-1997_05
Patent number
US05633279

Reaction notes

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