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Triethylamine → (S)-methyl 2-(6-((2',6'-dimethyl-4'-((1-propionylazetidin-3-yl)oxy)biphenyl-3-yl)methoxy)-2,3-dihydrobenzofuran-3-yl)acetate

HRID 2280662
Notes
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Reaction equation

HRID 2280662 reaction equation
FC(F)(F)C(O)=O.[NH:8]1[CH2:11][CH:10]([O:12][C:13]2[CH:18]=[C:17]([CH3:19])[C:16]([C:20]3[CH:25]=[CH:24][CH:23]=[C:22]([CH2:26][O:27][C:28]4[CH:41]=[CH:40][C:31]5[C@H:32]([CH2:35][C:36]([O:38][CH3:39])=[O:37])[CH2:33][O:34][C:30]=5[CH:29]=4)[CH:21]=3)=[C:15]([CH3:42])[CH:14]=2)[CH2:9]1.C(N(CC)CC)C.[C:50](Cl)(=[O:53])[CH2:51][CH3:52]>ClCCl>[CH3:19][C:17]1[CH:18]=[C:13]([O:12][CH:10]2[CH2:11][N:8]([C:50](=[O:53])[CH2:51][CH3:52])[CH2:9]2)[CH:14]=[C:15]([CH3:42])[C:16]=1[C:20]1[CH:25]=[CH:24][CH:23]=[C:22]([CH2:26][O:27][C:28]2[CH:41]=[CH:40][C:31]3[C@H:32]([CH2:35][C:36]([O:38][CH3:39])=[O:37])[CH2:33][O:34][C:30]=3[CH:29]=2)[CH:21]=1
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 62324Propionyl chlorideHCID 131733506(S)-Methyl 2-(6-((4'-(azetidin-3-yloxy)-2',6'-dimethylbiphenyl-3-yl)methoxy)-2,3-dihydrobenzofuran-3-yl)acetate 2,2,2-trifluoroacetate

Product 1

HCID 117699335(S)-methyl 2-(6-((2',6'-dimethyl-4'-((1-propionylazetidin-3-yl)oxy)biphenyl-3-yl)methoxy)-2,3-dihydrobenzofuran-3-yl)acetateYield 94.4%

Reagents, catalysts & solvents

1
HCID 6344DichloromethaneSolvent2×

Procedure

The crude (S)-methyl 2-(6-((4′-(azetidin-3-yloxy)-2′,6′-dimethylbiphenyl-3-yl)methoxy)-2,3-dihydrobenzofuran-3-yl)acetate 2,2,2-trifluoroacetate 14c (40 mg, 0.09 mmol) was dissolved in 3 mL of dichloromethane, followed by addition of triethylamine (0.1 mL, 0.26 mmol) and propionyl chloride (11 mL, 0.13 mmol) successively. The reaction solution was stirred for 12 hours. The resulting solution was mixed with 10 mL of dichloromethane, washed with saturated sodium chloride solution (5 mL), dried with anhydrous magnesium sulphate, and filtered. The filtrate was concentrated under reduced pressure to obtain the crude title compound (S)-methyl 2-(6-((2′,6′-dimethyl-4′-((1-propionylazetidin-3-yl)oxy)biphenyl-3-yl)methoxy)-2,3-dihydrobenzofuran-3-yl)acetate 14d (45 mg) as a yellow oil, which was directly used in the next step without further purification.

Workup

  1. washwashed with saturated sodium chloride solution (5 mL)
  2. dry with materialdried with anhydrous magnesium sulphate
  3. filtrationfiltered
  4. concentrationThe filtrate was concentrated under reduced pressure

Sources & evidence

ORD record
ord-161501b0f90848f195e2a43fb2e18693
Source dataset
uspto-grants-2015_09
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US09139548B2

Reaction notes

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