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Phenylacetaldehyde → 1-[3-(4-fluorophenyl)-1-(tetrahydropyran-2-yl)-1H-indazol-5-yl]-2-phenylethan-1-ol

HRID 1272787
Notes
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Reaction equation

HRID 1272787 reaction equation
Br[C:2]1[CH:3]=[C:4]2[C:8](=[CH:9][CH:10]=1)[N:7]([CH:11]1[CH2:16][CH2:15][CH2:14][CH2:13][O:12]1)[N:6]=[C:5]2[C:17]1[CH:22]=[CH:21][C:20]([F:23])=[CH:19][CH:18]=1.C([Li])CCC.CCCCCC.[C:35]1([CH2:41][CH:42]=[O:43])[CH:40]=[CH:39][CH:38]=[CH:37][CH:36]=1>O1CCCC1>[F:23][C:20]1[CH:21]=[CH:22][C:17]([C:5]2[C:4]3[C:8](=[CH:9][CH:10]=[C:2]([CH:42]([OH:43])[CH2:41][C:35]4[CH:40]=[CH:39][CH:38]=[CH:37][CH:36]=4)[CH:3]=3)[N:7]([CH:11]3[CH2:16][CH2:15][CH2:14][CH2:13][O:12]3)[N:6]=2)=[CH:18][CH:19]=1
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 4

HCID 998PhenylacetaldehydeHCID 8058HexaneHCID 224796801h-Indazole,5-bromo-3-(4-fluorophenyl)-1-(tetrahydro-2h-pyran-2-yl)-HCID 178418339Butyllithium

Product 1

HCID 224803491-[3-(4-fluorophenyl)-1-(tetrahydropyran-2-yl)-1H-indazol-5-yl]-2-phenylethan-1-olYield 59.1%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of 5-bromo-3-(4-fluorophenyl)-1-(tetrahydropyran-2-yl)-1H-indazole (0.50 g, 1.0 mmol) in dried tetrahydrofuran (15 mL) under nitrogen at −78° C. was added dropwise a 1.6 M solution of butyl lithium in hexane (1.1 mL, 1.7 mmol). After stirring for 20 minutes, to the reaction mixture was added phenylacetaldehyde (0.228 g, 1.9 mmol). The reaction mixture was stirred additional 1 hour at −78° C. and the temperature was gradually raised to room temperature. It was quenched with water and extracted with dichloromethane. The extracts were dried over magnesium sulfate, filtered, and concentrated. The residue was then purified by chromatography (SiO2, 15–30% ethyl acetate/hexane) to provide the title compound (0.246 g, 44% yield): 1H NMR (CDCl3) δ 7.86 (m, 2H), 7.80 (d, 1H), 7.09–7.47 (m, 9H), 6.98 (dd, 1H), 5.70 (dd, 1H), 5.07 (t, 1H), 4.08 (m, 1H), 3.65 (m, 1H), 3.06 (d, 1H), 2.67 (m, 2H), 2.11 (m, 2H), 1.75 (m, 3H); ES-MS (m/z) 417 [M+1]+.

Workup

  1. stirringThe reaction mixture was stirred additional 1 hour at −78° C.
  2. customIt was quenched with water
  3. extractionextracted with dichloromethane
  4. dry with materialThe extracts were dried over magnesium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customThe residue was then purified by chromatography (SiO2, 15–30% ethyl acetate/hexane)

Sources & evidence

ORD record
ord-eea1d0ad8a054d81a14f91ab1f64442d
Source dataset
uspto-grants-2007_04
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07208513B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes