Acetic Anhydride → HCID 69711158, compound

HRID 362629Notes

Reaction equation

HRID 362629 reaction equation
[CH2:1]([C:8]1([OH:28])[C:21]2[O:22][C@@H:18]3[C@@:19]45[CH2:23][CH2:24][N:25]([CH3:26])[C@@H:13]([C@@H:14]4[CH:15]=[CH:16][C@@H:17]3[OH:27])[CH2:12][C:11]([C:20]5=2)=[CH:10][CH2:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C(N(CC)CC)C.[C:36](OC(=O)C)(=[O:38])[CH3:37]>C(Cl)Cl.CN(C)C1C=CN=CC=1>[C:36]([C@:17]1([OH:27])[CH:16]=[CH:15][C@@H:14]2[C@@:19]34[CH2:23][CH2:24][N:25]([CH3:26])[C@@H:13]2[CH2:12][C:11]2[C:20]3=[C:21]([O:22][C@@H:18]14)[C:8]([CH2:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1)([OH:28])[CH2:9][CH:10]=2)(=[O:38])[CH3:37]

Participants

6

Reactant 3

HCID 7918Acetic AnhydrideHCID 8471TriethylamineHCID 69505881HCID 69505881, compound

Product 1

HCID 69711158HCID 69711158, compoundYield 97.5%

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6344DichloromethaneSolvent

Procedure

To a solution of 3-benzylmorphine (12.7 g, 33.9 mmol) in CH2Cl2 (300 ml), was added triethylamine (10 ml, 99%, 71.2 mmol), acetic anhydride (7.5 ml, 99%, 78.6 mmol), and 4-dimethylaminopyridine (0.3 g). The reaction mixture was heated under reflux for 2 hr, cooled with an ice--H2O bath, then transferred to a separatory funnel, and washed with cold 10% aqueous NaHCO3 solution (3×100 ml). The organic layer was separated and dried over anhydrous Na2SO4. Removal of solvent gave 6-acetyl-3-benzylmorphine (13.87 g, 96% yield). IR (KBr)(ν, cm-1): 2900 (m, sharp), 1727 (s, sharp, AcO); NMR (δH)(CDCl3): 7.47-7.20 (5, m, --C6H5), 6.68 (1, d, J, 8.1, 2-H), 6.48 (1, d, J, 8.2, 1-H), 5.63 (1, dm, J, 10.1, 7-H), 5.43 (1, dt, J, 10.1 & 2.3, 8-H), 5.25-5.15 (1, m, 6-H), 5.14 (2, s, --OCH2Ph), 5.10 (1, dd, J, 6.7 & 1.1, 5-H), 3.34 (1, dd, J, 6.0 & 3.3, 9-H), 3.01 (1, d, J, 18.6, 10-Hβ), 2.79-2.70 (1, m, 14-H), 2.59(1, dd, J, 12.1 & 3.4, 16-He), 2.43 (3, s, N--CH3), 2.37 (1, td, J, 11.8 & 3.6, 16-Ha), 2.27 (1, dd, J, 18.8 & 6.6, 10-Hα), 2.10 (3, s, AcO), 2.04 (1, td, J, 11.9 & 5.1, 15-Ha), 1.86 (1, dm, J, 12.5, 15-He).

Workup

  1. temperatureThe reaction mixture was heated
  2. temperatureunder reflux for 2 hr
  3. customH2O bath, then transferred to a separatory funnel
  4. washwashed with cold 10% aqueous NaHCO3 solution (3×100 ml)
  5. customThe organic layer was separated
  6. dry with materialdried over anhydrous Na2SO4
  7. customRemoval of solvent

Sources & evidence

ORD record
ord-4df67c659cd74fd8ac5ec14b2ee4c425
Source dataset
uspto-grants-1999_02
Patent number
US05869669

Reaction notes

Loading…