4-(3-(Dimethylamino)propyl)-3,4-dihydro-2H-benzo[b][1,4]thiazin-7-amine → HCID 178483516, compound

HRID 424545Notes

Reaction equation

HRID 424545 reaction equation
[CH3:1][N:2]([CH3:17])[CH2:3][CH2:4][CH2:5][N:6]1[CH2:11][CH2:10][S:9][C:8]2[CH:12]=[C:13]([NH2:16])[CH:14]=[CH:15][C:7]1=2.I.[S:19]1[CH:23]=[CH:22][CH:21]=[C:20]1[C:24](SC)=[NH:25]>C(O)C.C([O-])(O)=O.[Na+]>[CH3:17][N:2]([CH3:1])[CH2:3][CH2:4][CH2:5][N:6]1[CH2:11][CH2:10][S:9][C:8]2[CH:12]=[C:13]([NH:16][C:24]([C:20]3[S:19][CH:23]=[CH:22][CH:21]=3)=[NH:25])[CH:14]=[CH:15][C:7]1=2

Participants

5

Reactant 2

HCID 591440934-(3-(Dimethylamino)propyl)-3,4-dihydro-2H-benzo[b][1,4]thiazin-7-amineHCID 66704664Methyl thiophene-2-carbimidothioate hydroiodide

Product 1

HCID 178483516HCID 178483516, compoundYield 86%

Reagents, catalysts & solvents 2

HCID 702EthanolSolventHCID 516892Sodium BicarbonateSolvent

Procedure

A solution of 4-(3-(dimethylamino)propyl)-3,4-dihydro-2H-benzo[b][1,4]thiazin-7-amine (0.22 g, 0.875 mmol) in dry ethanol (10 mL) was treated with methyl thiophene-2-carbimidothioate hydroiodide (0.499 g, 1.750 mmol) at room temperature, and the resulting mixture was stirred over night (18 hours) at room temperature. The reaction was diluted with saturated NaHCO3 solution (25 mL), and the product was extracted into CH2Cl2 (3×20 mL). The combined CH2Cl2 layers were washed with brine (15 mL) and dried (Na2SO4). The solvent was evaporated, and the crude material was purified by column chromatography (5:95 (2M NH3 in MeOH):CH2Cl2) on silica gel to obtain the title product 22 (0.27 g, 86%) as a solid. 1H NMR (DMSO-d6) δ 7.68 (d, 1H, J=3.0 Hz), 7.56 (d, 1H, J=5.1 Hz), 7.06 (dd, 1H, J=3.9, 4.8 Hz), 6.69 (d, 1H, J=8.7 Hz), 6.52-6.45 (m, 2H), 6.33 (brs, 2H), 3.51-3.48 (m, 2H), 3.25 (t, 2H, J=7.2 Hz), 3.04-3.01 (m, 2H), 2.25 (t, 2H, J=6.9 Hz), 2.14 (s, 6H), 1.70-1.61 (m, 2H); ESI-MS (m/z, %): 361 (MH+, 93), 276 (100); HPLC purity: 98.23% by area.

Workup

  1. extractionthe product was extracted into CH2Cl2 (3×20 mL)
  2. washThe combined CH2Cl2 layers were washed with brine (15 mL)
  3. dry with materialdried (Na2SO4)
  4. customThe solvent was evaporated
  5. customthe crude material was purified by column chromatography (5:95 (2M NH3 in MeOH):CH2Cl2) on silica gel

Sources & evidence

ORD record
ord-a043d50ff1ba476981f0eb0028f9b228
Source dataset
uspto-grants-2012_01
Patent number
US08106043B2

Reaction notes

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