Tripropylamine → 5-(tert-Butoxycarbonylamino-methyl)-2-methyl-1H-indole-3-carboxylic Acid Benzyl Ester

HRID 966534Notes

Reaction equation

[CH2:1]([O:8][C:9](=[O:30])/[CH:10]=[C:11](/[NH:13][C:14]1[CH:19]=[CH:18][C:17]([CH2:20][NH:21][C:22]([O:24][C:25]([CH3:28])([CH3:27])[CH3:26])=[O:23])=[CH:16][C:15]=1I)\[CH3:12])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C(N(CCC)CCC)CC>CN(C=O)C.C([O-])(=O)C.[Pd+2].C([O-])(=O)C>[CH2:1]([O:8][C:9]([C:10]1[C:19]2[C:14](=[CH:15][CH:16]=[C:17]([CH2:20][NH:21][C:22]([O:24][C:25]([CH3:28])([CH3:27])[CH3:26])=[O:23])[CH:18]=2)[NH:13][C:11]=1[CH3:12])=[O:30])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

Conditions

Temperature: 120 °C

Procedure

To a mixture of (E)-3-[4-(tert-butoxycarbonylamino-methyl)-2-iodo-phenylamino]-but-2-enoic acid benzyl ester (5.25 g, 10 mmol) and tripropylamine (1.9 mL, 10 mmol) in DMF (10 mL) was added palladium acetate (112 mg, 0.5 mmol). The mixture was stirred at 120° C. for 1 hour and then partitioned between ethyl acetate and water. The organic phase was washed with water and brine, dried over Na2SO4 and filtered. The filtrate was concentrated in vacuo to give a residue, which was recrystallized from ethyl acetate and hexanes to give 1.9 g (48%) of the desired product as a yellowish solid: MS(APCI−): m/z 393.1.4 (M−H).

Workup

custompartitioned between ethyl acetate and water
washThe organic phase was washed with water and brine
dry with materialdried over Na2SO4
filtrationfiltered
concentrationThe filtrate was concentrated in vacuo
customto give a residue, which
customwas recrystallized from ethyl acetate and hexanes

Sources & evidence

ORD record: ord-a66721ec5b0d4e5bbbe1a4f65f94328c
Source dataset: uspto-grants-2005_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06951848B2

Reaction notes

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