Ethanol → Ethyl 1-chloroisoquinoline-7-carboxylate

HRID 711084Notes

Reaction equation

HRID 711084 reaction equation
[Cl:1][C:2]1[C:11]2[C:6](=[CH:7][CH:8]=[C:9]([C:12](Cl)=[O:13])[CH:10]=2)[CH:5]=[CH:4][N:3]=1.C([OH:17])C.C(N([CH2:23][CH3:24])CC)C>O1CCCC1>[Cl:1][C:2]1[C:11]2[C:6](=[CH:7][CH:8]=[C:9]([C:12]([O:13][CH2:23][CH3:24])=[O:17])[CH:10]=2)[CH:5]=[CH:4][N:3]=1

Participants

5

Reactant 3

HCID 702EthanolHCID 8471TriethylamineHCID 874207001-Chloroisoquinoline-7-carbonyl chloride

Product 1

HCID 86664617Ethyl 1-chloroisoquinoline-7-carboxylateYield 96%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Conditions

Temperature
0 °C

Procedure

1-Chloroisoquinoline-7-carbonyl chloride (3.02 g, 13.4 mmol) was dissolved in tetrahydrofuran (135 mL) and was cooled to 0° C. Ethanol (6.1 mL, 94 mmol) and triethylamine (2.05 mL, 14.7 mmol) were added. The reaction was allowed to warm to room temperature and stir for 2 hours. The reaction mixture was partitioned between ethyl acetate (500 mL) and saturated aqueous sodium bicarbonate (250 mL). The organic layer was dried over magnesium sulfate, filtered, and concentrated to give the title compound (3.0 g, 96%) as a yellow solid. +ESI (M+H) 236.1; 1H NMR (400 MHz, CDCl3, δ): 9.06 (s, 1H), 8.30-8.39 (m, 2H), 7.89 (d, J=8.6 Hz, 1H), 7.63 (d, J=5.7 Hz, 1H), 4.48 (q, J=7.1 Hz, 2H), 1.46 (t, J=7.1 Hz, 3H).

Workup

  1. temperatureto warm to room temperature
  2. customThe reaction mixture was partitioned between ethyl acetate (500 mL) and saturated aqueous sodium bicarbonate (250 mL)
  3. dry with materialThe organic layer was dried over magnesium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated

Sources & evidence

ORD record
ord-b3dccf5af697463b9ac710748f4d87ba
Source dataset
uspto-grants-2015_11
Patent number
US09181252B2

Reaction notes

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