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Sodium Carbonate → tert-butyl 4-(7-(4-amino-2-fluorophenoxy)thieno[3,2-b]pyridin-2-yl)-5,6-dihydropyridine-1(2H)-carboxylate

HRID 1676349
Notes
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Reaction equation

HRID 1676349 reaction equation
[F:1][C:2]1[CH:3]=[C:4]([CH:6]=[CH:7][C:8]=1[O:9][C:10]1[CH:15]=[CH:14][N:13]=[C:12]2[CH:16]=[C:17](I)[S:18][C:11]=12)[NH2:5].CC1(C)C(C)(C)OB([C:28]2[CH2:33][CH2:32][N:31]([C:34]([O:36][C:37]([CH3:40])([CH3:39])[CH3:38])=[O:35])[CH2:30][CH:29]=2)O1.C([O-])([O-])=O.[Na+].[Na+]>C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.COCCOC>[NH2:5][C:4]1[CH:6]=[CH:7][C:8]([O:9][C:10]2[CH:15]=[CH:14][N:13]=[C:12]3[CH:16]=[C:17]([C:28]4[CH2:33][CH2:32][N:31]([C:34]([O:36][C:37]([CH3:40])([CH3:39])[CH3:38])=[O:35])[CH2:30][CH:29]=4)[S:18][C:11]=23)=[C:2]([F:1])[CH:3]=1
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 3

HCID 10340Sodium CarbonateHCID 4642098Tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1,2,3,6-tetrahydropyridine-1-carboxylateHCID 584749503-Fluoro-4-((2-iodothieno[3,2-b]pyridin-7-yl)oxy)aniline

Product 1

HCID 59684980tert-butyl 4-(7-(4-amino-2-fluorophenoxy)thieno[3,2-b]pyridin-2-yl)-5,6-dihydropyridine-1(2H)-carboxylateYield 80.2%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalyst
HCID 80711,2-DimethoxyethaneSolvent

Conditions

Temperature
100 °C

Procedure

A round-bottomed flask was charged with 3-fluoro-4-(2-iodothieno[3,2-b]pyridin-7-yloxy)aniline (Example 6, Step A, 200.0 mg, 0.518), tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl) -5,6-dihydropyridine-1(2H)-carboxylate (160.1 mg, 0.518 mmol), tetrakis(triphenylphosphine)palladium (119.7 mg, 0.104 mmol), Na2CO3 (1.30 ml, 2.59 mmol) and DME (50 mL). The reaction mixture was stirred under nitrogen at 100° C. until the starting material had been consumed (4 hours). Then the reaction mixture was cooled to room temperature and partitioned between EtOAc (100 mL) and H2O (100 mL). The phases were separated and the aqueous phase was re-extracted with EtOAc (3×100 mL). The combined organic layers were dried (Na2SO4), filtered and concentrated to yield a crude product. The crude product was purified by silica gel chromatography (DCM/7 M NH3 in MeOH from 50/1 to 10/1, v/v) to give product (183.4 mg, 80%). LRMS (APCI pos): m/e 442 (M+1). 1H NMR (400 MHz, CD3OD) δ 8.41 (d, 1H), 7.36 (s, 1H), 7.03 (t, 1H), 6.54 (dd, 1H), 6.47 (m, 2H), 6.30 (m, 1H), 4.13 (m, 2H), 3.83 (br s, 2H), 3.68 (m, 2H), 2.64 (m, 2H), 1.50 (s, 9H).

Workup

  1. customhad been consumed (4 hours)
  2. temperatureThen the reaction mixture was cooled to room temperature
  3. custompartitioned between EtOAc (100 mL) and H2O (100 mL)
  4. customThe phases were separated
  5. extractionthe aqueous phase was re-extracted with EtOAc (3×100 mL)
  6. dry with materialThe combined organic layers were dried (Na2SO4)
  7. filtrationfiltered
  8. concentrationconcentrated
  9. customto yield a crude product
  10. customThe crude product was purified by silica gel chromatography (DCM/7 M NH3 in MeOH from 50/1 to 10/1

Sources & evidence

ORD record
ord-653ba112f32545a7add85c1b8cb4ae26
Source dataset
uspto-grants-2011_08
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08003662B2

Reaction notes

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