Triethylamine → Naphthalen-2-yl sulfamate

HRID 327707Notes

Reaction equation

HRID 327707 reaction equation
Cl[S:2]([N:5]=C=O)(=[O:4])=[O:3].[CH:8]1[C:17]2[C:12](=[CH:13][CH:14]=[CH:15][CH:16]=2)[CH:11]=[CH:10][C:9]=1[OH:18].C(N(CC)CC)C>C(#N)C.C(OCC)(=O)C.O>[CH:8]1[C:17]2[C:12](=[CH:13][CH:14]=[CH:15][CH:16]=2)[CH:11]=[CH:10][C:9]=1[O:18][S:2](=[O:3])(=[O:4])[NH2:5]

Participants

7

Reactant 3

HCID 8471TriethylamineHCID 86632-NaphtholHCID 70918Chlorosulfonyl isocyanate

Product 1

HCID 21149346Naphthalen-2-yl sulfamateYield 107.5%

Reagents, catalysts & solvents 3

HCID 962WaterSolvent2×HCID 6342AcetonitrileSolvent3×HCID 8857Ethyl AcetateSolvent

Procedure

To a cold (ice-acetone bath) solution of 11.3 ml (0.13 mole, 18.4 g) of chlorosulfonyl isocyanate in 50 ml of acetonitrile was added dropwise a solution of 2.3 g (0.13 mole) of water in 10 ml of acetonitrile at such a rate that the temperature was maintained between -2° to 7° C. (ca. 45 min). After the addition was complete, the solution was stirred for 5 min and then treated dropwise with a solution of 14.4 g (0.1 mole) of β-naphthol, 20.9 ml (0.15 mole, 15.2 g) of triethylamine and 100 ml of acetonitrile at such a rate that the temperature did not exceed 10° C. (ca. 30 min). The mixture was stirred at ambient temperature for 3.5 h and then diluted with 100 ml of ethyl acetate and 50 ml of water. The layers were separated and the organic layer was washed once with 50 ml of water and once with 100 ml of brine, dried (sodium sulfate), and concentrated to give 24 g of dark gum. The gum was purified by column chromatography on 400 g of silica gel eluted with methylene chloride. Fractions containing the desired product were combined and concentrated to yield 5.7 g (26%) of the title compound as a white solid, mp 114°-115° C. (benzene).

Workup

  1. temperaturewas maintained between -2° to 7° C. (ca. 45 min)
  2. additionAfter the addition
  3. customdid not exceed 10° C.
  4. custom(ca. 30 min)
  5. stirringThe mixture was stirred at ambient temperature for 3.5 h
  6. customThe layers were separated
  7. washthe organic layer was washed once with 50 ml of water and once with 100 ml of brine
  8. dry with materialdried (sodium sulfate)
  9. concentrationconcentrated

Sources & evidence

ORD record
ord-f8fbe34c13ad409ab9aa47dbfb7970a6
Source dataset
uspto-grants-1993_12
Patent number
US05273993

Reaction notes

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