Acetic Anhydride → 1-Acetamido-5,6,7,8-tetrahydronaphthalene

HRID 1884051Notes

Reaction equation

HRID 1884051 reaction equation
C(O[C:5](=[O:7])[CH3:6])(=O)C.[NH2:8][C:9]1[C:18]2[CH2:17][CH2:16][CH2:15][CH2:14][C:13]=2[CH:12]=[CH:11][CH:10]=1>CCCCCC>[C:9]1([NH:8][C:5](=[O:7])[CH3:6])[C:18]2[CH2:17][CH2:16][CH2:15][CH2:14][C:13]=2[CH:12]=[CH:11][CH:10]=1

Participants

4

Reactant 2

HCID 7918Acetic AnhydrideHCID 166715-Tetralinylamine

Product 1

HCID 2320651-Acetamido-5,6,7,8-tetrahydronaphthaleneYield 71.5%

Reagents, catalysts & solvents 1

HCID 8058HexaneSolvent

Procedure

Acetic anhydride (100 ml, 1.06 mole) was added rapidly to neat 1-amino-5,6,7,8-tetrahydronaphthalene (25 g, 0.17 mole) (Aldrich) with stirring. The mixture quickly solidified and was allowed to stand overnight. The broken mass was suspended in hexane (200 ml), filtered, then resuspended in methylene chloride (150 ml). After stirring 10 minutes, the suspension was diluted with an equal volume of hexane, filtered, and the solid dried at 95° C. under reduced pressure to give N-(5,6,7,8-tetrahydro-1-naphthyl)acetamide (23 g). 1H NMR (CDCl3, 200 MHz) δ: 1.68-1.90 (m, 4H, CH2's), 2.20 (s, 3H, CH3), 2.52-2.68 (m, 2H, ArCH2), 2.70-2.84 (m, 2H, ArCH2), 3.94 (br s, 1H, NH), 6.92 (d, J=8 Hz, 1H, Ar), 7.10 (t, J=8 Hz, 1H, Ar), 7.53 (d, J=8 Hz, 1H, Ar). Anal. Calculated for C12H15NO: C, 76.16; H, 7.99; N, 7.40. Found: C, 76.13; H, 8.04; N, 7.40.

Workup

  1. filtrationfiltered
  2. stirringAfter stirring 10 minutes
  3. additionthe suspension was diluted with an equal volume of hexane
  4. filtrationfiltered
  5. customthe solid dried at 95° C. under reduced pressure

Sources & evidence

ORD record
ord-c79a94e5a8004c77a7eb502c1b1b8b2b
Source dataset
uspto-grants-2004_07
Patent number
US06762188B1

Reaction notes

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