HCID 66704472, compound → HCID 178453755, compound

HRID 1917221Notes

Reaction equation

HRID 1917221 reaction equation
[OH:1][CH2:2][CH2:3][N:4]([CH2:12][CH2:13][N:14]1[CH2:19][CH2:18][S:17][C:16]2[CH:20]=[CH:21][C:22]([N+:24]([O-])=O)=[CH:23][C:15]1=2)[C:5](=[O:11])[O:6][C:7]([CH3:10])([CH3:9])[CH3:8].I.[S:28]1[CH:32]=[CH:31][CH:30]=[C:29]1[C:33](SC)=[NH:34]>C(O)C.ClCCl.[Pd]>[OH:1][CH2:2][CH2:3][N:4]([CH2:12][CH2:13][N:14]1[CH2:19][CH2:18][S:17][C:16]2[CH:20]=[CH:21][C:22]([NH:24][C:33]([C:29]3[S:28][CH:32]=[CH:31][CH:30]=3)=[NH:34])=[CH:23][C:15]1=2)[C:5](=[O:11])[O:6][C:7]([CH3:10])([CH3:9])[CH3:8]

Participants

6

Reactant 2

HCID 66704472HCID 66704472, compoundHCID 66704664Methyl thiophene-2-carbimidothioate hydroiodide

Product 1

HCID 178453755HCID 178453755, compoundYield 47.6%

Reagents, catalysts & solvents 3

HCID 23938PalladiumCatalystHCID 702EthanolSolventHCID 6344DichloromethaneSolvent

Procedure

A stirred suspension of tert-butyl 2-hydroxyethyl(2-(6-nitro-2H-benzo[b][1,4]thiazin-4(3H)-yl)ethyl)carbamate (590 mg, 1.539 mmol) and palladium, 10 wt. % on activated carbon (164 mg, 0.154 mmol) in ethanol (10 mL) was stirred at room temperature under an atmosphere of hydrogen (1 atm) for 2 hours (yellow color disappears). To this mixture was then added methyl thiophene-2-carbimidothioate hydroiodide (878 mg, 3.08 mmol), and the resulting mixture was stirred overnight at room temperature. The mixture was then diluted with dichloromethane and then filtered through Celite. The filtrate was then diluted with water and extracted with dichloromethane (4×). The combined organics were dried, filtered, concentrated, and then chromatographed in ethyl acetate, giving the desired product (339 mg, 47.6%) as a yellow foam. 1H NMR (DMSO-d6) δ 7.69 (s, 1H), 7.58 (d, J=4.8 Hz, 1H), 7.07 (t, J=4.2 Hz, 1H), 6.41-6.25 (m, 3H), 6.08 (d, J=8.1 Hz, 1H), 4.71-4.65 (m, 1H), 3.63-3.54 (m, 2H), 3.49-3.33 (m, 6H), 3.27-3.15 (m, 2H), 3.02-2.94 (m, 2H), 1.39-1.29 (m, 9H); ESI-MS (m/z, %): 463 (MH+, 100).

Workup

  1. filtrationfiltered through Celite
  2. additionThe filtrate was then diluted with water
  3. extractionextracted with dichloromethane (4×)
  4. customThe combined organics were dried
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customchromatographed in ethyl acetate

Sources & evidence

ORD record
ord-fcaeeb9fda97485fb34f23d71e8d0484
Source dataset
uspto-grants-2013_12
Patent number
US08618286B2

Reaction notes

Loading…