2-Tert-butoxycarbonyloxy-5-fluoro-4-iodo-indole-1-carboxylic acid tert-butyl ester → 2-tert-butoxycarbonyloxy-4-[3-(1-tert-butoxycarbonyl-3,4-dimethyl-1H-pyrrol-2-yl)-3-hydroxy-prop-1-ynyl]-5-fluoro-indole-1-carboxylic acid tert-butyl ester

HRID 1861019Notes

Reaction equation

HRID 1861019 reaction equation
[C:1]([O:5][C:6]([N:8]1[C:16]2[C:11](=[C:12](I)[C:13]([F:17])=[CH:14][CH:15]=2)[CH:10]=[C:9]1[O:19][C:20]([O:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[O:21])=[O:7])([CH3:4])([CH3:3])[CH3:2].[C:27]([O:31][C:32]([N:34]1[CH:38]=[C:37]([CH3:39])[C:36]([CH3:40])=[C:35]1[CH:41]([OH:44])[C:42]#[CH:43])=[O:33])([CH3:30])([CH3:29])[CH3:28]>C1COCC1.C(N(CC)CC)C.[Cu]I.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>[C:1]([O:5][C:6]([N:8]1[C:16]2[C:11](=[C:12]([C:43]#[C:42][CH:41]([C:35]3[N:34]([C:32]([O:31][C:27]([CH3:30])([CH3:29])[CH3:28])=[O:33])[CH:38]=[C:37]([CH3:39])[C:36]=3[CH3:40])[OH:44])[C:13]([F:17])=[CH:14][CH:15]=2)[CH:10]=[C:9]1[O:19][C:20]([O:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[O:21])=[O:7])([CH3:4])([CH3:3])[CH3:2]

Participants

7

Reactant 2

HCID 102058642-Tert-butoxycarbonyloxy-5-fluoro-4-iodo-indole-1-carboxylic acid tert-butyl esterHCID 235502733,4-Dimethyl-2-(1-hydroxy-prop-2-ynyl)-pyrrole-1-carboxylic acid tert-butyl ester

Product 1

HCID 101214212-tert-butoxycarbonyloxy-4-[3-(1-tert-butoxycarbonyl-3,4-dimethyl-1H-pyrrol-2-yl)-3-hydroxy-prop-1-ynyl]-5-fluoro-indole-1-carboxylic acid tert-butyl ester

Reagents, catalysts & solvents 4

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 178418397HCID 178418397, compoundCatalystHCID 8028TetrahydrofuranSolventHCID 8471TriethylamineSolvent

Procedure

A solution of 2-tert-butoxycarbonyloxy-5-fluoro-4-iodo-indole-1-carboxylic acid tert-butyl ester (from Example 2 above) (1 g, 2.22 mmol), and 3,4-dimethyl-2-(1-hydroxy-prop-2-ynyl)-pyrrole-1-carboxylic acid tert-butyl ester (from Example 45 above) (1.38 g, 5.54 mmol) in dry THF(12 mL) and triethylamine(Aldrich, 12 mL) was degassed by bubbling argon through the solution for 10 minutes. At this time copper(I) iodide (Aldrich, 84.4 mg, 0.44 mmol) and (Ph3P)4Pd (0.25 g, 0.22 mmol) were added, and the reaction mixture was stirred at room temperature overnight. The reaction mixture was filtered and concentrated in vacuo. Flash chromatography (silica gel, 85:15 hexanes/ethyl acetate) afforded 2-tert-butoxycarbonyloxy-4-[3-(1-tert-butoxycarbonyl-3,4-dimethyl-1H-pyrrol-2-yl)-3-hydroxy-prop-1-ynyl]-5-fluoro-indole-1-carboxylic acid tert-butyl ester as an orange oil. (Yield 0.76 g, 57%).

Workup

  1. customby bubbling argon through the solution for 10 minutes
  2. filtrationThe reaction mixture was filtered
  3. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-dfabd11607874644bb590454cafceef6
Source dataset
uspto-grants-2003_03
Patent number
US06531598B1

Reaction notes

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