2-Formyl-4-methoxybenzeneboronic acid → HCID 10410670, compound

HRID 1292902Notes

Reaction equation

HRID 1292902 reaction equation
Br[C:2]1[CH:3]=[C:4]2[C:8]3=[C:9]([CH2:11][CH2:12][N:7]3[C@H:6]3[CH2:13][CH2:14][N:15]([C:17]([O:19][C:20]([CH3:23])([CH3:22])[CH3:21])=[O:18])[CH2:16][C@@H:5]23)[CH:10]=1.[CH:24]([C:26]1[CH:31]=[C:30]([O:32][CH3:33])[CH:29]=[CH:28][C:27]=1B(O)O)=[O:25].O.O.O.O.O.O.O.O.[OH-].[Ba+2].[OH-]>COCCOC.O.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>[CH:24]([C:26]1[CH:31]=[C:30]([O:32][CH3:33])[CH:29]=[CH:28][C:27]=1[C:2]1[CH:3]=[C:4]2[C:8]3=[C:9]([CH2:11][CH2:12][N:7]3[C@H:6]3[CH2:13][CH2:14][N:15]([C:17]([O:19][C:20]([CH3:21])([CH3:22])[CH3:23])=[O:18])[CH2:16][C@@H:5]23)[CH:10]=1)=[O:25]

Participants

7

Reactant 3

HCID 27343652-Formyl-4-methoxybenzeneboronic acidHCID 17749109Barium hydroxide, octahydrateHCID 20577007Tert-butyl (6aS,10aR)-2-bromo-4,5,7,8,10,10a-hexahydropyrido[4,3-b]pyrrolo[3,2,1-hi]indole-9(6aH)carboxylate

Product 1

HCID 10410670HCID 10410670, compoundYield 41%

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolvent2×HCID 80711,2-DimethoxyethaneSolvent

Procedure

To a solution of tert-butyl(6aS,10aR)-2-bromo-4,5,7,8,10,10a-hexahydropyrido[4,3-b]pyrrolo[3,2,1-hi]indole-9(6aH)-carboxylate (0.600 g, 1.59 mmol) in DME (35 mL) was added 2-formyl-4-methoxybenzeneboronic acid (0.344 g, 1.91 mmol), tetrakis(triphenylphosphine)palladium(0) (0.110 g), barium hydroxide octahydrate (0.753 g, 2.39 mmol), and H2O (10 mL). The combined mixture was refluxed for 20 h. Once at room temperature, the mixture was taken up in H2O (300 mL) and extracted with EtOAc (3×100 mL). The combined extracts were dried over MgSO4 and stripped of solvent under reduced pressure. Purification by normal phase HPLC using 25% EtOAc in hexanes afforded 0.280 g (41%) of tert-butyl (6aS,10aR)-2-(2-formyl-4-methoxyphenyl)-4,5,7,8,10,10a-hexahydropyrido[4,3-b]pyrrolo[3,2,1-hi]indole-9(6aH)-carboxylate.

Workup

  1. temperatureThe combined mixture was refluxed for 20 h
  2. customOnce at room temperature
  3. extractionextracted with EtOAc (3×100 mL)
  4. dry with materialThe combined extracts were dried over MgSO4
  5. customPurification by normal phase

Sources & evidence

ORD record
ord-0a832d7bc94747a4ac84ff346a416888
Source dataset
uspto-grants-2007_07
Patent number
US07238690B2

Reaction notes

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