Glutaric anhydride → 2-Octanoyloxy-1-(octanoyloxymethyl)ethyl hydrogen glutarate

HRID 279909

Reaction equation

HRID 279909 reaction equation
[C:1]([O:10][CH2:11][CH:12]([OH:24])[CH2:13][O:14][C:15](=[O:23])[CH2:16][CH2:17][CH2:18][CH2:19][CH2:20][CH2:21][CH3:22])(=[O:9])[CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH3:8].C(N(CC)CC)C.[C:32]1(=[O:39])[O:38][C:36](=[O:37])[CH2:35][CH2:34][CH2:33]1.C([O-])(=O)CCCCCCC>CCOCC.C(Cl)Cl>[C:32]([O:24][CH:12]([CH2:13][O:14][C:15](=[O:23])[CH2:16][CH2:17][CH2:18][CH2:19][CH2:20][CH2:21][CH3:22])[CH2:11][O:10][C:1](=[O:9])[CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH3:8])(=[O:39])[CH2:33][CH2:34][CH2:35][C:36]([OH:38])=[O:37]

Participants

7

Reactant 4

HCID 7940Glutaric anhydride2×HCID 8471Triethylamine2×HCID 119389OctanoateHCID 1509111,3-Dioctanoyl glycerol

Product 1

HCID 233228862-Octanoyloxy-1-(octanoyloxymethyl)ethyl hydrogen glutarate

Reagents, catalysts & solvents 2

HCID 3283Diethyl EtherSolventHCID 6344DichloromethaneSolvent

Procedure

A solution of 2-hydroxy-3-octanoyloxypropyl octanoate (5.0 g.) in ether (30 ml.) was stirred with triethylamine (2.04 ml.) and glutaric anhydride (1.66 g.) for 3.5 hours. Further glutaric anhydride (0.8 g.) was then added together with triethylamine (1.0 ml.). This mixture was heated under reflux until no further starting octanoate could be detected by thin layer chromatography (silica: methylene chloride). The cooled reaction mixture was washed with 1M hydrochloric acid (2×20 ml.), then with water (2×20 ml.), dried (MgSO4) and evaporated to give 2-octanoyloxy-1-(octanoyloxymethyl)ethyl hydrogen glutarate as an oil (6.62 g.); NMR (CDCl3): 0.9 (6H, t, CH3), 1.1-2.1 (22H, m, CH2), 2.4 (8H, m, CH2CO), 4.0-4.4 (4H,m, CH2O), 5.1-5.4 (1H, br.t, CHO), 9.6 (1H, br.s, CO2H)ppm. Mass spectrum (major diagnostic peaks based on M=458, using chemical ionisation techniques): m/e 476 (M+NH4), 360 (M +NH4 --HO2C.(CH2)3.CO2H)

Workup

  1. temperatureThis mixture was heated
  2. temperatureunder reflux until
  3. customThe cooled reaction mixture
  4. washwas washed with 1M hydrochloric acid (2×20 ml.)
  5. dry with materialwith water (2×20 ml.), dried (MgSO4)
  6. customevaporated

Sources & evidence

ORD record
ord-7f45509cc2254f9f8333e2ba5f1b0838
Source dataset
uspto-grants-1986_05
Patent number
US04587262

Linked notes

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