Triethylamine → 4-(2-(5-Amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl ethyl carbonate

HRID 1259219Notes

Reaction equation

HRID 1259219 reaction equation
[NH2:1][C:2]1[C:11]2[N:10]=[CH:9][C:8]([CH2:12][CH2:13][C:14]3[CH:19]=[CH:18][C:17]([OH:20])=[CH:16][CH:15]=3)=[CH:7][C:6]=2[C:5]2[CH:21]=[CH:22][C:23]([CH3:25])=[CH:24][C:4]=2[N:3]=1.C(N(CC)CC)C.Cl[C:34]([O:36][CH2:37][CH3:38])=[O:35]>ClCCl.O>[C:34](=[O:35])([O:36][CH2:37][CH3:38])[O:20][C:17]1[CH:16]=[CH:15][C:14]([CH2:13][CH2:12][C:8]2[CH:9]=[N:10][C:11]3[C:2]([NH2:1])=[N:3][C:4]4[CH:24]=[C:23]([CH3:25])[CH:22]=[CH:21][C:5]=4[C:6]=3[CH:7]=2)=[CH:19][CH:18]=1

Participants

6

Reactant 3

HCID 8471TriethylamineHCID 10928Ethyl chloroformateHCID 582135504-(2-(5-Amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenol

Product 1

HCID 582136884-(2-(5-Amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl ethyl carbonate

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6344DichloromethaneSolvent2×

Conditions

Temperature
0 °C

Procedure

To a solution of 4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenol (from Example 170) (1.0 equiv.) and triethyl amine (2 equiv.) in dichloromethane (0.10 M) at 0° C. was added ethyl chloroformate (1.2 equiv.). The resulting mixture was allowed to stir for 30 minutes at 0° C., after which it was diluted with water and dichloromethane. The biphasic layers were separated and the aqueous layer was washed twice with dichloromethane. The combined organic layers were dried over anhydrous Na2SO4 and the volatiles were removed in vacuo. The resulting residue was purified by a COMBIFLASH® system (ISCO) using 0-50% ethyl acetate in hexanes to provide 4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl ethyl carbonate as a solid. 1H NMR (Acetone-d6): δ 8.78 (s, 1H), 8.73 (s, 1H), 8.28 (d, 1H), 7.43 (s, 1H), 7.33 (d, 2H), 7.10-7.17 (m, 3H), 6.64 (br, 2H), 4.18 (t, 2H), 3.25 (t, 2H), 3.14 (t, 2H), 2.45 (s, 3H), 1.68-1.77 (m, 2H), 0.97 (t, 3H). LRMS [M+H]=416.2

Workup

  1. customThe biphasic layers were separated
  2. washthe aqueous layer was washed twice with dichloromethane
  3. dry with materialThe combined organic layers were dried over anhydrous Na2SO4
  4. customthe volatiles were removed in vacuo
  5. customThe resulting residue was purified by a COMBIFLASH® system (ISCO)

Sources & evidence

ORD record
ord-eabc7edf26b34717b43d68574b87cda8
Source dataset
uspto-grants-2013_06
Patent number
US08466167B2

Reaction notes

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