Potassium Phosphate, Tribasic → 1-tert-Butyl 6-methyl 3-phenyl-1H-indole-1,6-dicarboxylate

HRID 1852665Notes

Reaction equation

HRID 1852665 reaction equation
I[C:2]1[C:10]2[C:5](=[CH:6][C:7]([C:11]([O:13][CH3:14])=[O:12])=[CH:8][CH:9]=2)[N:4]([C:15]([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:16])[CH:3]=1.[C:22]1(B(O)O)[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=1.COC1C=CC=C(OC)C=1C1C=CC=CC=1P(C1CCCCC1)C1CCCCC1.[O-]P([O-])([O-])=O.[K+].[K+].[K+]>C1(C)C=CC=CC=1.CC([O-])=O.CC([O-])=O.[Pd+2]>[C:22]1([C:2]2[C:10]3[C:5](=[CH:6][C:7]([C:11]([O:13][CH3:14])=[O:12])=[CH:8][CH:9]=3)[N:4]([C:15]([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:16])[CH:3]=2)[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=1

Participants

7

Reactant 4

HCID 62657Potassium Phosphate, TribasicHCID 66827Phenylboronic AcidHCID 71278271-tert-butyl 6-methyl 3-iodo-1H-indole-1,6-dicarboxylateHCID 112698722-Dicyclohexylphosphino-2',6'-dimethoxybiphenyl

Product 1

HCID 596260441-tert-Butyl 6-methyl 3-phenyl-1H-indole-1,6-dicarboxylate

Reagents, catalysts & solvents 2

HCID 167845palladium(II) acetateCatalystHCID 1140TolueneSolvent

Procedure

A mixture of 1-tert-butyl 6-methyl 3-iodo-1H-indole-1,6-dicarboxylate 62a (5.02 mmol, 2.016 g), phenylboronic acid 1x (7.53 mmol, 0.92 g), Pd(OAc)2 (0.402 mmol, 90 mg), Sphos 0.904 mmol, (0.37 g), and K3PO4 (10.1 mmol, 2.13 g) in toluene (10 mL) in sealed reaction vial was stirred at room temperature for 2 min and then heated at 90° C. under N2 for 4 h. The reaction mixture was quenched with EtOAc and water. The organic layer was concentrated and purified by flash column chromatography (silica gel, 8% EtOAc/hexanes). The desired product was collected as a light yellow solid that was washed with small amount of hexanes to obtain 62b as a white solid.

Workup

  1. customin sealed reaction vial
  2. temperatureheated at 90° C. under N2 for 4 h
  3. customThe reaction mixture was quenched with EtOAc and water
  4. concentrationThe organic layer was concentrated
  5. custompurified by flash column chromatography (silica gel, 8% EtOAc/hexanes)
  6. customThe desired product was collected as a light yellow solid
  7. washthat was washed with small amount of hexanes

Sources & evidence

ORD record
ord-d22b5e99bd984544a9b24866afb700e3
Source dataset
uspto-grants-2015_02
Patent number
US08962607B2

Reaction notes

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