Diisopropylethylamine → (E)-methyl 3-(4-((1R,3R)-2-((S)-3-fluoro-2-methylpropyl)-3-methyl-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indol-1-yl)phenyl)acrylate

HRID 1749028Notes

Reaction equation

HRID 1749028 reaction equation
FC(F)(F)S(O[CH2:7][C@H:8]([CH3:11])[CH2:9][F:10])(=O)=O.[CH3:14][C@H:15]1[NH:27][C@H:26]([C:28]2[CH:33]=[CH:32][C:31](/[CH:34]=[CH:35]/[C:36]([O:38][CH3:39])=[O:37])=[CH:30][CH:29]=2)[C:18]2[NH:19][C:20]3[C:25]([C:17]=2[CH2:16]1)=[CH:24][CH:23]=[CH:22][CH:21]=3.C(N(CC)C(C)C)(C)C>O1CCOCC1>[F:10][CH2:9][C@@H:8]([CH3:11])[CH2:7][N:27]1[C@H:15]([CH3:14])[CH2:16][C:17]2[C:25]3[C:20](=[CH:21][CH:22]=[CH:23][CH:24]=3)[NH:19][C:18]=2[C@H:26]1[C:28]1[CH:29]=[CH:30][C:31](/[CH:34]=[CH:35]/[C:36]([O:38][CH3:39])=[O:37])=[CH:32][CH:33]=1

Participants

5

Reactant 3

HCID 81531DiisopropylethylamineHCID 117719372(E)-methyl 3-(4-((1R,3R)-3-methyl-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indol-1-yl)phenyl)acrylateHCID 117719393(S)-3-fluoro-2-methylpropyl trifluoromethanesulfonate

Product 1

HCID 117719341(E)-methyl 3-(4-((1R,3R)-2-((S)-3-fluoro-2-methylpropyl)-3-methyl-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indol-1-yl)phenyl)acrylateYield 86%

Reagents, catalysts & solvents 1

HCID 312751,4-DioxaneSolvent

Conditions

Temperature
90 °C

Procedure

(S)-3-Fluoro-2-methylpropyl trifluoromethanesulfonate (obtained as described in Example 3, preparation of starting materials) (291 mg, 1.30 mmol) was added to a solution of (E)-methyl 3-(4-((1R,3R)-3-methyl-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indol-1-yl)phenyl)acrylate (300 mg, 0.87 mmol) and N,N-diisopropylethylamine (0.226 ml, 1.30 mmol) in 1,4-dioxane (5 ml). The mixture was stirred at 90° C. for 1 hour then the mixture was evaporated to dryness and the residue was partitioned between DCM (30 nil) and water (30 ml). The aqueous layer was extracted with DCM (30 ml) and the extracts combined with the organic layer. The combined extracts were filtered through a phase-separating paper and evaporated. The residue was purified by flash silica chromatography, elution solvent 15% EtOAc in heptane. Pure fractions were evaporated to dryness to afford (E)-methyl 3-(4-((1R,3R)-2-((S)-3-fluoro-2-methylpropyl)-3-methyl-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indol-1-yl)phenyl)acrylate (314 mg, 86%) as an off-white solid. 1H NMR (400 MHz, DMSO, 30° C.) δ 0.87 (3H, d), 1.06 (3H, d), 1.9-2.28 (2H, m), 2.55-2.8 (3H, m), 2.97-3.21 (1H, m), 3.72 (3H, s), 4.31-4.69 (2H, m), 4.88 (1H, s), 6.60 (1H, dd), 6.98 (1H, t), 7.04 (1H, t), 7.17-7.35 (3H, m), 7.44 (1H, d), 7.55-7.76 (3H, m), 10.65 (1H, s). m/z: ES+ [M+H]+ 421.

Workup

  1. customthe mixture was evaporated to dryness
  2. customthe residue was partitioned between DCM (30 nil) and water (30 ml)
  3. extractionThe aqueous layer was extracted with DCM (30 ml)
  4. filtrationThe combined extracts were filtered through a phase-separating paper
  5. customevaporated
  6. customThe residue was purified by flash silica chromatography, elution solvent 15% EtOAc in heptane
  7. customPure fractions were evaporated to dryness

Sources & evidence

ORD record
ord-d2628ac755c74e99a86dbf5835a1bd4e
Source dataset
uspto-grants-2015_10
Patent number
US09155727B2

Reaction notes

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