Triethylamine → HCID 21849002, compound

HRID 617701Notes

Reaction equation

HRID 617701 reaction equation
[Cl:1][C:2]1[C:7]2[C:8]3([CH2:13][CH2:14][S:15](=[O:17])(=[O:16])[C:6]=2[C:5]([Cl:18])=[CH:4][C:3]=1[C:19]([OH:21])=[O:20])[O:12][CH2:11][CH2:10][O:9]3.C(Cl)(=O)C(Cl)=O.[C:28]1(=O)[CH2:33][CH2:32][CH2:31][C:30](=[O:34])[CH2:29]1.C(N(CC)CC)C>CN(C)C=O.C(Cl)Cl>[Cl:1][C:2]1[C:7]2[C:8]3([CH2:13][CH2:14][S:15](=[O:17])(=[O:16])[C:6]=2[C:5]([Cl:18])=[CH:4][C:3]=1[C:19]([O:21][C:28]1[CH2:33][CH2:32][CH2:31][C:30](=[O:34])[CH:29]=1)=[O:20])[O:9][CH2:10][CH2:11][O:12]3

Participants

7

Reactant 4

HCID 8471TriethylamineHCID 104341,3-CyclohexanedioneHCID 65578Oxalyl chlorideHCID 67559146HCID 67559146, compound

Product 1

HCID 21849002HCID 21849002, compoundYield 27.9%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideCatalystHCID 6344DichloromethaneSolvent

Conditions

Temperature
0 °C

Procedure

1.75 g (4.97 mmol) of the title compound of Step F, 1.30 mL (0.015 mol) of oxalyl chloride (purchased from Janssen), and 2 drops of N,N-dimethylformamide were added to 50 mL of methylene chloride. The mixture was refluxed under nitrogen for 2 h and was then evaporated to dryness. 50 mL of methylene chloride was added to the residue and the resulting mixture was evaporated to dryness. Another 50 mL of methylene chloride was added to the residue, and the solution was cooled to about 0° C. 0.61 g (5.5 mmol) of 1,3-cyclohexanedione (purchased from Aldrich Chemical Company) was added followed by 2.15 mL (0.0154 mol) of triethylamine, and the mixture was stirred over 2 days while warming to room temperature. The mixture was evaporated to dryness and the crude product was chromatographed over silica gel eluting with a mixture of ethyl acetate:hexane (6:4) to yield 0.62 g of the title compound of Step G as a solid melting at 168° C. (dec). 1H NMR (CDCl3): δ2.1 (m,2H), 2.5 (t,2H), 2.7 (t,4H), 3.6 (m,2H), 4.2 (m,2H), 4.4 (m,2H), 6.1 (s,1H), 7.8 (s,1H).

Workup

  1. temperatureThe mixture was refluxed under nitrogen for 2 h
  2. customwas then evaporated to dryness
  3. addition50 mL of methylene chloride was added to the residue
  4. customthe resulting mixture was evaporated to dryness
  5. additionAnother 50 mL of methylene chloride was added to the residue
  6. temperaturewhile warming to room temperature
  7. customThe mixture was evaporated to dryness
  8. customthe crude product was chromatographed over silica gel eluting with a mixture of ethyl acetate:hexane (6:4)

Sources & evidence

ORD record
ord-0ff1eb113f644f75aac67c911a43d9d4
Source dataset
uspto-grants-1999_09
Patent number
US05952266

Reaction notes

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