Pyridine → Ethyl 5-(4-(((9H-fluoren-9-yl)methoxy)carbonylamino)phenylthio)-4-nitrothiophene-2-carboxylate

HRID 883994Notes

Reaction equation

HRID 883994 reaction equation
[NH2:1][C:2]1[CH:7]=[CH:6][C:5]([S:8][C:9]2[S:13][C:12]([C:14]([O:16][CH2:17][CH3:18])=[O:15])=[CH:11][C:10]=2[N+:19]([O-:21])=[O:20])=[CH:4][CH:3]=1.[CH:22]1[C:34]2[CH:33]([CH2:35][O:36][C:37](Cl)=[O:38])[C:32]3[C:27](=[CH:28][CH:29]=[CH:30][CH:31]=3)[C:26]=2[CH:25]=[CH:24][CH:23]=1.N1C=CC=CC=1>C(Cl)Cl>[CH:22]1[C:34]2[CH:33]([CH2:35][O:36][C:37]([NH:1][C:2]3[CH:3]=[CH:4][C:5]([S:8][C:9]4[S:13][C:12]([C:14]([O:16][CH2:17][CH3:18])=[O:15])=[CH:11][C:10]=4[N+:19]([O-:21])=[O:20])=[CH:6][CH:7]=3)=[O:38])[C:32]3[C:27](=[CH:28][CH:29]=[CH:30][CH:31]=3)[C:26]=2[CH:25]=[CH:24][CH:23]=1

Participants

5

Reactant 3

HCID 1049PyridineHCID 343679-Fluorenylmethyl chloroformateHCID 67040833Ethyl 5-(4-aminophenylthio)-4-nitrothiophene-2-carboxylate

Product 1

HCID 67040709Ethyl 5-(4-(((9H-fluoren-9-yl)methoxy)carbonylamino)phenylthio)-4-nitrothiophene-2-carboxylateYield 100%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

A suspension of the product of Example 90B (0.500 g, 1.541 mmol) and 9-fluorenylmethoxycarbonyl chloride (0.478 g, 1.849 mmol) in methylene chloride (10 mL) under a nitrogen atmosphere was treated with pyridine (0.25 mL, 3.083 mmol), and the resulting solution stirred for 18 hours at room temperature. The reaction was diluted with methylene chloride (50 mL) and washed with 1N aqueous HCl (50 mL) then water (50 mL). The organic was dried over magnesium sulfate, filtered, and concentrated by rotary evaporation. Purification by silica gel flash chromatography eluting with methylene chloride afforded the title compound as a bright yellow solid (0.842 g, quantitative). 1H NMR (300 MHz, DMSO-D6) δ ppm 1.23 (t, J=7.17 Hz, 3 H) 4.24 (q, J=7.23 Hz, 2 H) 4.35 (t, J=6.43 Hz, 1 H) 4.57 (d, J=6.25 Hz, 2 H) 7.29-7.50 (m, 4 H) 7.69 (s, 4 H) 7.77 (d, J=7.35 Hz, 2 H) 7.92 (d, J=7.35 Hz, 2 H) 8.11 (s, 1 H) 10.15 (s, 1 H); MS (ESI+) m/z 564 (M+NH4)+, 569 (M+Na)+.

Workup

  1. washwashed with 1N aqueous HCl (50 mL)
  2. dry with materialThe organic was dried over magnesium sulfate
  3. filtrationfiltered
  4. concentrationconcentrated by rotary evaporation
  5. customPurification by silica gel flash chromatography
  6. washeluting with methylene chloride

Sources & evidence

ORD record
ord-88311f469165444a8f779f74aab77f7d
Source dataset
uspto-grants-2012_08
Patent number
US08236950B2

Reaction notes

Loading…