9-Fluorenylmethyl chloroformate → HCID 9869646, compound

HRID 1837014Notes

Reaction equation

HRID 1837014 reaction equation
[NH2:1][CH2:2][CH2:3][CH2:4][CH2:5][N:6]1[C:18]2[C:17]3[CH:16]=[CH:15][CH:14]=[CH:13][C:12]=3[N:11]=[C:10]([NH2:19])[C:9]=2[N:8]=[CH:7]1.Cl[C:21]([O:23][CH2:24][CH:25]1[C:37]2[CH:36]=[CH:35][CH:34]=[CH:33][C:32]=2[C:31]2[C:26]1=[CH:27][CH:28]=[CH:29][CH:30]=2)=[O:22]>ClCCl>[NH2:19][C:10]1[C:9]2[N:8]=[CH:7][N:6]([CH2:5][CH2:4][CH2:3][CH2:2][NH:1][C:21](=[O:22])[O:23][CH2:24][CH:25]3[C:37]4[CH:36]=[CH:35][CH:34]=[CH:33][C:32]=4[C:31]4[C:26]3=[CH:27][CH:28]=[CH:29][CH:30]=4)[C:18]=2[C:17]2[CH:16]=[CH:15][CH:14]=[CH:13][C:12]=2[N:11]=1

Participants

4

Reactant 2

HCID 343679-Fluorenylmethyl chloroformateHCID 154537751-(4-aminobutyl)-1H-imidazo[4,5-c]quinolin-4-amine

Product 1

HCID 9869646HCID 9869646, compound

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a solution of 1-(4-aminobutyl)-1H-imidazo[4,5-c]quinolin-4-amine (9.3 mg, 36 μmol) in 10 mL of dichloromethane at ambient temperature was added 9-fluorenylmethyl chloroformate (8 mg, 30 μmol) as a solid. The mixture was vortexed at room temperature for about 1 min., becoming slightly cloudy. Aminomethylpolystyrene (ca. 90 mg, 0.64 meq/g, 100-200 mesh, Bachem) was added to quench excess chloroformate, and after a few minutes the mixture was filtered through a short plug of silica gel, eluting with 10:1 dichloromethane-methanol to isolate the product as a solid. 1H NMR (500 MHz, DMSO-d6) δ 8.27 (s, 1H), 8.08 (d, J=8.1 Hz, 1H), 7.87 (d, J=7.6 Hz, 2H), 7.65 (m, 3H), 7.50 (t, J=7.6 Hz, 1H), 7.40 (t, J=7.3 Hz, 2H), 7.3 (m, 4H), 7.15 (bs, 2H), 4.62 (t, J=7 Hz, 2H), 4.27 (d, J=7 Hz, 2H), 4.17 (t, J=7 Hz, 1H), 3.03 (q, J=7 Hz, 2H), 1.84 (quintet, J=7 Hz, 2H), 1.45 (quintet, J=7 Hz, 2H). MS (APCI) m/e 478.28 (M+H).

Workup

  1. additionAminomethylpolystyrene (ca. 90 mg, 0.64 meq/g, 100-200 mesh, Bachem) was added
  2. customto quench excess chloroformate
  3. filtrationafter a few minutes the mixture was filtered through a short plug of silica gel
  4. washeluting with 10:1 dichloromethane-methanol

Sources & evidence

ORD record
ord-86b2766574514ed086bb11490d6db957
Source dataset
uspto-grants-2004_08
Patent number
US06780873B2

Reaction notes

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