Pyridine → cis-4-[(3,5-Bis-trifluoromethyl-benzyl)-methoxycarbonyl-amino]-2-ethyl-6-trifluoromethyl-3,4-dihydro-2H-quinoline-1-carboxylic Acid Ethyl Ester

HRID 1355645Notes

Reaction equation

HRID 1355645 reaction equation
[CH2:1]([O:3][C:4]([N:6]1[C:15]2[C:10](=[CH:11][C:12]([C:16]([F:19])([F:18])[F:17])=[CH:13][CH:14]=2)[C@H:9]([NH:20][CH2:21][C:22]2[CH:27]=[C:26]([C:28]([F:31])([F:30])[F:29])[CH:25]=[C:24]([C:32]([F:35])([F:34])[F:33])[CH:23]=2)[CH2:8][C@@H:7]1[CH2:36][CH3:37])=[O:5])[CH3:2].N1C=CC=CC=1>ClCCl>[CH2:1]([O:3][C:4]([N:6]1[C:15]2[C:10](=[CH:11][C:12]([C:16]([F:17])([F:18])[F:19])=[CH:13][CH:14]=2)[C@H:9]([N:20]([CH2:21][C:22]2[CH:27]=[C:26]([C:28]([F:29])([F:30])[F:31])[CH:25]=[C:24]([C:32]([F:35])([F:33])[F:34])[CH:23]=2)[C:4]([O:3][CH3:1])=[O:5])[CH2:8][C@@H:7]1[CH2:36][CH3:37])=[O:5])[CH3:2]

Participants

4

Reactant 2

HCID 1049PyridineHCID 86584715cis-4-(3,5-bis-trifluoromethyl-benzylamino)-2-ethyl-6-trifluoromethyl-3,4-dihydro-2H-quinoline-1-carboxylic acid ethyl ester

Product 1

HCID 86584714cis-4-[(3,5-Bis-trifluoromethyl-benzyl)-methoxycarbonyl-amino]-2-ethyl-6-trifluoromethyl-3,4-dihydro-2H-quinoline-1-carboxylic Acid Ethyl EsterYield 162%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

A solution of cis-4-(3,5-bis-trifluoromethyl-benzylamino)-2-ethyl-6-trifluoromethyl-3,4-dihydro-2H-quinoline-1-carboxylic acid ethyl ester (Example 7E) (2.0 g, 3.7 mmol) and pyridine (0.58 g, 7.4 mmol) in 100 mL of dichloromethane was cooled in an ice/water bath as methyl chlorofomate (0.87 g, 9.2 mmol) was added slowly. After stirring overnight at room temperature, the reaction mixture was washed twice with a 2N hydrochloric acid solution, dried over magnesium sulfate, filtered and concentrated in vacuo to afford the crude product, which was purified by silica gel chromatography using 5-10% ethyl acetate/hexanes as eluent to afford 1.8 g of the title product. MS m/z 601 (M++1); 1H NMR (coalescing mixture of conformers, CDCl3) δ 0.6-0.8 (bm, 3H), 1.2-1.3 (bm, 3H), 1.3-1.5 (bm, 2H), 1.6-1.75 (bm, 1H), 2.1-2.3 (bm, 1H), 3.7-3.9 (bs, 3H), 4.0-4.4 (bm, 4H), 5.0-5.6 (bm, 2H), 7.1 (s, 1H), 7.4-7.6 (bm, 2H), 7.6-7.8 (bm, 3H).

Workup

  1. additionwas added slowly
  2. washthe reaction mixture was washed twice with a 2N hydrochloric acid solution
  3. dry with materialdried over magnesium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo
  6. customto afford the crude product, which
  7. customwas purified by silica gel chromatography

Sources & evidence

ORD record
ord-8a52a104571d4989a8e353ce7e95dd24
Source dataset
uspto-grants-2003_07
Patent number
US06586448B1

Reaction notes

Loading…