Acetone → 3-[[2-(4-Morpholinyl)ethyl]amino]-1,2-benzisoxazol-5-yl methylcarbamate

HRID 1292521Notes

Reaction equation

HRID 1292521 reaction equation
[N:1]1([CH2:7][CH2:8][NH:9][C:10]2[C:14]3[CH:15]=[C:16]([OH:19])[CH:17]=[CH:18][C:13]=3[O:12][N:11]=2)[CH2:6][CH2:5][O:4][CH2:3][CH2:2]1.[CH3:20][N:21]=[C:22]=[O:23].CC(C)=O.C(Cl)Cl>CCOC(C)=O.[Cu]Cl>[CH3:20][NH:21][C:22](=[O:23])[O:19][C:16]1[CH:17]=[CH:18][C:13]2[O:12][N:11]=[C:10]([NH:9][CH2:8][CH2:7][N:1]3[CH2:6][CH2:5][O:4][CH2:3][CH2:2]3)[C:14]=2[CH:15]=1

Participants

7

Reactant 4

HCID 180AcetoneHCID 6344DichloromethaneHCID 12228Methyl IsocyanateHCID 187964613-[[2-(4-Morpholinyl)ethyl]-amino]-1,2-benzisoxazol-5-ol

Product 1

HCID 187964473-[[2-(4-Morpholinyl)ethyl]amino]-1,2-benzisoxazol-5-yl methylcarbamateYield 32.9%

Reagents, catalysts & solvents 2

HCID 62652Cuprous chlorideCatalystHCID 8857Ethyl AcetateSolvent

Procedure

To a stirred solution of 3-[[2-(4-morpholinyl)ethyl]-amino]-1,2-benzisoxazol-5-ol (1 g) and a catalytic amount of copper(I)chloride (0.05 g) in EtOAc (100 ml) was added methyl isocyanate (0.26 g). After 24 hours TLC (silica gel, 1:1:20 acetone/MeOL/DCM) showed no starting material. The reaction was filtered through neutral alumina eluting with EtOAc (1 l) and the filtrate was concentrated in vacuo. The residue was further purified by flash chromatography (silica gel) eluting with 1:1:20 acetone/MeOH/DCM to yield 0.4 g of the product, m.p. 135°-136° C.

Workup

  1. filtrationThe reaction was filtered through neutral alumina eluting with EtOAc (1 l)
  2. concentrationthe filtrate was concentrated in vacuo
  3. customThe residue was further purified by flash chromatography (silica gel)
  4. washeluting with 1:1:20 acetone/MeOH/DCM

Sources & evidence

ORD record
ord-3e4b42ccb3a94495ae4c8856feace7f3
Source dataset
uspto-grants-1998_05
Patent number
US05756754

Reaction notes

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