Triethylamine → 2,2,2-Trichloroethyl (+/-)-[2-(3',4'-dihydro-2'-hydroxyspiro[cyclopentane-1,1'(2'H)-naphthalen]-2'-yl)ethyl]carbamate

HRID 5542

Reaction equation

HRID 5542 reaction equation
[NH2:1][CH2:2][CH2:3][C:4]1([OH:18])[CH2:13][CH2:12][C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[C:5]21[CH2:17][CH2:16][CH2:15][CH2:14]2.C(N(CC)CC)C.[Cl:26][C:27]([Cl:34])([Cl:33])[CH2:28][O:29][C:30](Cl)=[O:31]>C(Cl)Cl>[OH:18][C:4]1([CH2:3][CH2:2][NH:1][C:30](=[O:31])[O:29][CH2:28][C:27]([Cl:34])([Cl:33])[Cl:26])[CH2:13][CH2:12][C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[C:5]21[CH2:14][CH2:15][CH2:16][CH2:17]2

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 870632,2,2-Trichloroethyl chloroformateHCID 19983233(+/-)-2'-(2-Aminoethyl)-3',4'-dihydrospiro[cyclopentane-1,1'(2'H)-napthalen]-2'-ol

Product 1

HCID 570670292,2,2-Trichloroethyl (+/-)-[2-(3',4'-dihydro-2'-hydroxyspiro[cyclopentane-1,1'(2'H)-naphthalen]-2'-yl)ethyl]carbamateYield 78.1%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Conditions

Temperature
0 °C

Procedure

A solution of the product from Example 9 (0.88 g, 3.59 mmol) and triethylamine (0.40 g, 3.78 mmol) in 10 mL of CH2Cl2 was cooled to 0° C. and treated dropwise with 2,2,2-trichloroethylchloroformate (0.80 g, 3.78 mmol) in 2 mL CH2Cl2. The resulting solution was stirred at 0° C. for 30 minutes and warmed to room temperature. The reaction mixture was washed with saturated aq. NaHCO3 solution (10 mL). The aqueous phase was extracted with CH2Cl2 (10 mL). The combined organic extracts were dried (MgSO4), filtered and concentrated. The residue was purified by chromatography (silica gel, 10:1 heptane/ethyl acetate) to give the title compound (1.18 g, 78%) as a viscous oil.

Workup

  1. temperaturewarmed to room temperature
  2. washThe reaction mixture was washed with saturated aq. NaHCO3 solution (10 mL)
  3. extractionThe aqueous phase was extracted with CH2Cl2 (10 mL)
  4. dry with materialThe combined organic extracts were dried (MgSO4)
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customThe residue was purified by chromatography (silica gel, 10:1 heptane/ethyl acetate)

Sources & evidence

ORD record
ord-01efe08bb86845ba8cb6c06c77c689fa
Source dataset
uspto-grants-1993_09
Patent number
US05245028

Linked notes

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