Dimethyl Sulfoxide → 2,3,4,5-Tetrahydro-1-benzoxepin-6-carboxaldehyde

HRID 1107538Notes

Reaction equation

HRID 1107538 reaction equation
CS(C)=O.[C:5](Cl)(=[O:9])[C:6](Cl)=O.[O:11]1[C:17]2[CH:18]=[CH:19][CH:20]=C[C:16]=2[CH2:15][CH:14](CO)[CH2:13][CH2:12]1.C(N(CC)CC)C>C(Cl)Cl>[O:11]1[C:17]2=[CH:18][CH:19]=[CH:20][C:6]([CH:5]=[O:9])=[C:16]2[CH2:15][CH2:14][CH2:13][CH2:12]1

Participants

6

Reactant 4

HCID 679Dimethyl SulfoxideHCID 8471TriethylamineHCID 65578Oxalyl chlorideHCID 18787485HCID 18787485, compound

Product 1

HCID 187873792,3,4,5-Tetrahydro-1-benzoxepin-6-carboxaldehyde

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent3×

Conditions

Temperature
-78 °C

Procedure

DMSO (1.85 ml, 26 mmol) was added slowly to a -78° C. solution of oxalyl chloride in methylene chloride (10 ml of 2 M, 20 mmol). To this solution was added slowly a solution of 2,3,4,5-tetrahydrobenzoxepin-4-methanol (2.3 g, 13 mmol) in methylene chloride, and the mixture was stirred 30 min at -78° C. Triethyl amine (7.53 ml, 52 mmol) was added slowly to the reaction mixture, which was then allowed to warm to room temperature. The mixture was diluted with methylene chloride (50 ml) and washed with water and then brine. The organic layer was concentrated in vacuo to an oil (2.28 g, 100%).

Workup

  1. temperatureto warm to room temperature
  2. washwashed with water
  3. concentrationThe organic layer was concentrated in vacuo to an oil (2.28 g, 100%)

Sources & evidence

ORD record
ord-afbfb711c5e5423e9fc7d14297df663d
Source dataset
uspto-grants-2000_05
Patent number
US06060506

Reaction notes

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